AMC V8 bellhousing patterns - confirmation?

Do I understand correctly that essentially ALL of the AMC V8's (304,
360 and 401) share a common bellhousing pattern and that they all have
the same physical dimensions?

And that the V8 bellhousing pattern is the same as a 258?

Meaning it's safe to assume any bellhousing (or auto trans) that'll
bolt to a 258 will "bolt on" to a 304, 360 or 401?

Any variations to the above in "some" years engines .... 258's or V8's?

Also that an easy way to determine displacement for any given block is
to look for (look at) the raised numbers cast into the block .... e.g.
a 304 will have "304", cast into the block, a 360 will have "360" and
so on.

Many thanks

Lynn in St George
(long time lurker 'cause my CJ7 Jeep has so much in common with AMC's)
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AMC V8 bellhousing patterns - confirmation?

Yes from 1972 up the AMC 6 and 8 share the same bell pattern. And yes the raised # under the motor mount bracket is the CID. 1967 to 71 the deck height was lower on the v-8 and the bell on the 6 was different.
Davis

Sent from my iPhone

On Apr 2, 2011, at 12:41 PM, Lynn Howell wrote:

> Do I understand correctly that essentially ALL of the AMC V8's (304, 360 and 401) share a common bellhousing pattern and that they all have the same physical dimensions?
>
> And that the V8 bellhousing pattern is the same as a 258?
>
> Meaning it's safe to assume any bellhousing (or auto trans) that'll bolt to a 258 will "bolt on" to a 304, 360 or 401?
>
> Any variations to the above in "some" years engines .... 258's or V8's?
>
> Also that an easy way to determine displacement for any given block is to look for (look at) the raised numbers cast into the block .... e.g. a 304 will have "304", cast into the block, a 360 will have "360" and so on.
>
> Many thanks
>
> Lynn in St George
> (long time lurker 'cause my CJ7 Jeep has so much in common with AMC's)
> _______________________________________________
> AMC-list mailing list
> AMC-list@list.amc-list.com
> http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com
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AMC V8 bellhousing patterns - confirmation?

" From: Davis
"
" Yes from 1972 up the AMC 6 and 8 share the same bell pattern. And yes
" the raised # under the motor mount bracket is the CID. 1967 to 71 the
" deck height was lower on the v-8 and the bell on the 6 was different.
" Davis
"
"
" On Apr 2, 2011, at 12:41 PM, Lynn Howell wrote:
"
" > Do I understand correctly that essentially ALL of the AMC V8's (304,
" > 360 and 401) share a common bellhousing pattern and that they all
" > have the same physical dimensions?
" >
" > And that the V8 bellhousing pattern is the same as a 258?
" >
" > Meaning it's safe to assume any bellhousing (or auto trans) that'll
" > bolt to a 258 will "bolt on" to a 304, 360 or 401?
" >
" > Any variations to the above in "some" years engines .... 258's or V8's?

nb. on the 258s - 1st year was '71, with the small bellhousing [which
dated back to the 172/184/196 with prewar origins] for 1 year only.
they're rare, but they're the caveat on -any- 258.

the jeep 4.0, being a development of the amc i6, also has the i6/v8
bellhousing, but theirs have a cutout for their efi's cps. nb. the
cps can be moved to the crank balancer, with a kit.

" > Also that an easy way to determine displacement for any given block
" > is to look for (look at) the raised numbers cast into the block ....
" > e.g. a 304 will have "304", cast into the block, a 360 will have
" > "360" and so on.

yes, amc essentially made only 1 block, with internal displacement
variations, and they are usually marked as stated - but [rare again]
there are service blocks which lack marking. they have the extra
strength of 401 blocks but are often bored only to 360. bellhousing
pattern is the same from the mid-'66 290 up through the 401.
________________________________________________________________________
Andrew Hay the genius nature
internet rambler is to see what all have seen
adh@an.bradford.ma.us and think what none thought
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AMC V8 bellhousing patterns - confirmation?

The only note I think needs changing from Davis' post on engine deck height
is that the deck height from 67 to 69 was the same, 1970 and newer the deck
height was increased. 1970 and newer engnes have dogleg exhaust ports. 1969
and olde have rectangular exhaust ports
You can identify 1969 and older engine blocks by the 7/16 inch diameter
headbolts. 1970 and newer used 1/2 inch diameter headbolts. Davis is correct
with the pre 1972 bells being unique to the inline six or the V-8s. 1972 and
after the bells are interchangeable between v-8s and inline sixes. Service
blocks (replacement blocks from the factory) came with a "universal" bore.
These blocks do not have an engine CID cast on them.

1971 and older engines have a certain style crankflange. 1972 saw the
introduction of Chrysler automatics to AMC which prompted a new style
crankflange. The two are interchangeable with adaptors and some machining.

Some one please jump in here if I'm wrong.

Armand

----- Original Message -----
From: "Davis"
To: "AMC, Rambler, Nash, Jeep and family"
Sent: Saturday, April 02, 2011 12:56 PM
Subject: Re: [AMC-list] AMC V8 bellhousing patterns - confirmation?

> Yes from 1972 up the AMC 6 and 8 share the same bell pattern. And yes the
> raised # under the motor mount bracket is the CID. 1967 to 71 the deck
> height was lower on the v-8 and the bell on the 6 was different.
> Davis
>
> Sent from my iPhone
>
> On Apr 2, 2011, at 12:41 PM, Lynn Howell wrote:
>
>> Do I understand correctly that essentially ALL of the AMC V8's (304, 360
>> and 401) share a common bellhousing pattern and that they all have the
>> same physical dimensions?
>>
>> And that the V8 bellhousing pattern is the same as a 258?
>>
>> Meaning it's safe to assume any bellhousing (or auto trans) that'll bolt
>> to a 258 will "bolt on" to a 304, 360 or 401?
>>
>> Any variations to the above in "some" years engines .... 258's or V8's?
>>
>> Also that an easy way to determine displacement for any given block is to
>> look for (look at) the raised numbers cast into the block .... e.g. a 304
>> will have "304", cast into the block, a 360 will have "360" and so on.
>>
>> Many thanks
>>
>> Lynn in St George
>> (long time lurker 'cause my CJ7 Jeep has so much in common with AMC's)
>> _______________________________________________
>> AMC-list mailing list
>> AMC-list@list.amc-list.com
>> http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com
> _______________________________________________
> AMC-list mailing list
> AMC-list@list.amc-list.com
> http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com

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AMC V8 bellhousing patterns - confirmation?

Thanks for the confirmation - and other details added by all who
responded.

One more quick question ....

Because I'm struggling with the length of the engine in my specific
situation (e.g. the water pump "nose" is much closer to the radiator
than I'd like .... it's a long story), my sense is that most any of
the AMC V-8's would be 8 to 10 inches shorter than a 258 .... a couple
of approx. 4 inch cylinders and a couple of water jackets shorter.
Does that make sense.

Thanks again
Lynn in St George

------------------------------

Yes from 1972 up the AMC 6 and 8 share the same bell pattern. And yes
the raised # under the motor mount bracket is the CID. 1967 to 71 the
deck height was lower on the v-8 and the bell on the 6 was different.
Davis

Sent from my iPhone

On Apr 2, 2011, at 12:41 PM, Lynn Howell wrote:

> Do I understand correctly that essentially ALL of the AMC V8's (304,
> 360 and 401) share a common bellhousing pattern and that they all
> have the same physical dimensions?
>
> And that the V8 bellhousing pattern is the same as a 258?
>
> Meaning it's safe to assume any bellhousing (or auto trans) that'll
> bolt to a 258 will "bolt on" to a 304, 360 or 401?
>
> Any variations to the above in "some" years engines .... 258's or
> V8's?
>
> Also that an easy way to determine displacement for any given block
> is to look for (look at) the raised numbers cast into the block ....
> e.g. a 304 will have "304", cast into the block, a 360 will have
> "360" and so on.

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AMC V8 bellhousing patterns - confirmation?

You're more or less correct. The water pump and timing cover are thicker on the V-8, so it's more like 5-7" shorter instead of 8-10". But it takes up a lot more room side to side. For the six get a CJ-5 water pump and pulley. 1/2-3/4" between the fan and radiator is normal for the Americans and Gremlins and Hornets too.

---------------
Date: Sun, 3 Apr 2011 08:04:42 -0600
From: Lynn Howell

Thanks for the confirmation - and other details added by all who
responded.

One more quick question ....

Because I'm struggling with the length of the engine in my specific
situation (e.g. the water pump "nose" is much closer to the radiator
than I'd like .... it's a long story), my sense is that most any of
the AMC V-8's would be 8 to 10 inches shorter than a 258 .... a couple
of approx. 4 inch cylinders and a couple of water jackets shorter.
Does that make sense.

--
Frank Swygert
Publisher, "American Motors Cars"
Magazine (AMC)
For all AMC enthusiasts
http://www.amc-mag.com
(free download available!)

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AMC V8 bellhousing patterns - confirmation?

Are we talking about a 6 cyl? Switching to 4.0L waterpump (Grand Cherokee, which is centered fan)and pulleys/brackets moves the pump and belt away from the rad. If V8, the pre-Delco alt pulleys are closer to the engine and pump is shorter too than say Grand Wagoneer.

From: Lynn Howell
To: AMC-list@list.amc-list.com
Subject: Re: [AMC-list] AMC V8 bellhousing patterns - confirmation?
Message-ID: <70DA4BA0-BD57-425B-A053-4A6B905B97B2@aol.com>
Content-Type: text/plain; charset="us-ascii"; Format="flowed";
DelSp="yes"

Thanks for the confirmation - and other details added by all who
responded.

One more quick question ....

Because I'm struggling with the length of the engine in my specific
situation (e.g. the water pump "nose" is much closer to the radiator
than I'd like .... it's a long story), my sense is that most any of
the AMC V-8's would be 8 to 10 inches shorter than a 258 .... a couple
of approx. 4 inch cylinders and a couple of water jackets shorter.
Does that make sense.

Thanks again
Lynn in St George
_______________________________________________
AMC-list mailing list
AMC-list@list.amc-list.com
http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com

AMC V8 bellhousing patterns - confirmation?

" From: Frank Swygert
"
" For the six get a CJ-5 water pump and pulley. 1/2-3/4" between the
" fan and radiator is normal for the Americans and Gremlins and Hornets too.

early '70s! amc used the short pump on '65 americans and '65-'74 big
jeeps and cjs. in '75 they went to the same pump as amc cars were
using.

" From: Jim Blair
"
"
" Are we talking about a 6 cyl? Switching to 4.0L waterpump (Grand
" Cherokee, which is centered fan) and pulleys/brackets moves the pump
" and belt away from the rad.

wrangler is centered too. only cherokee and comanche aren't, because
they were designed for a v6, not the looong 4.0.
________________________________________________________________________
Andrew Hay the genius nature
internet rambler is to see what all have seen
adh@an.bradford.ma.us and think what none thought
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AMC V8 bellhousing patterns - confirmation?

" From: adh@an.bradford.ma.us (Sandwich Maker)
"
"
" " From: Jim Blair
" "
" "
" " Are we talking about a 6 cyl? Switching to 4.0L waterpump (Grand
" " Cherokee, which is centered fan) and pulleys/brackets moves the pump
" " and belt away from the rad.
"
" wrangler is centered too. only cherokee and comanche aren't, because
" they were designed for a v6, not the looong 4.0.

nb. i think they changed the pump bolt pattern in the '99/'00 4.0
block redesign. if so, only earlier pumps would back-fit older sixes.
________________________________________________________________________
Andrew Hay the genius nature
internet rambler is to see what all have seen
adh@an.bradford.ma.us and think what none thought
_______________________________________________
AMC-list mailing list
AMC-list@list.amc-list.com
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AMC V8 bellhousing patterns - confirmation?

yep 5 bolts instead of 4 and possibly different inlet angle to boot.

Mark Price
Morgantown, WV 26508
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrac II
"I realize that death is inevitable.
I just don't want to be around when it happens!"

----- Original Message -----

> From: "Sandwich Maker"
> To: amc-list@list.amc-list.com
> Sent: Monday, April 4, 2011 11:24:09 AM
> Subject: Re: [AMC-list] AMC V8 bellhousing patterns - confirmation?
>
> " From: adh@an.bradford.ma.us (Sandwich Maker)
> "
> "
> " " From: Jim Blair
> " "
> " "
> " " Are we talking about a 6 cyl? Switching to 4.0L waterpump (Grand
> " " Cherokee, which is centered fan) and pulleys/brackets moves the
> pump
> " " and belt away from the rad.
> "
> " wrangler is centered too. only cherokee and comanche aren't,
> because
> " they were designed for a v6, not the looong 4.0.
>
> nb. i think they changed the pump bolt pattern in the '99/'00 4.0
> block redesign. if so, only earlier pumps would back-fit older
> sixes.
> ________________________________________________________________________
> Andrew Hay the genius nature
> internet rambler is to see what all have
> seen
> adh@an.bradford.ma.us and think what none
> thought
> _______________________________________________
> AMC-list mailing list
> AMC-list@list.amc-list.com
> http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com
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