are 55-57 Chevy V8 engine mounts different?

I have been asked if 55-57 chevy engine mounts are different from the standard 3-bolt mounts for all the small-block Chevy engines. Is this accurate?

I have never owned or worked on a tri-5, so I have no idea.

 

Yes they are.

 

Can you give me some details as to exactly what is different? I have seen that the blocks used a front mount, where is that located? Pics?

 

...'55-'57's have two "L" brackets that bolts to the front of block, which in turn sit on rubber biscuit mounts on the crossmember...they are not "side-mounted" from the factory

 

55-57 blocks did not have motor mount bosses cast into the side of the blocks like later motors. Early blocks used 2 bolt front mounts(on either side of and slightly below the timing cover) and mounts on the bellhousing. '58 and later blocks have the three bolt side mounts

 

Look here for the front mounts http://chevy.oldcarmanualproject.com/shop/1955/55csm0648.html
The rear mounts are shear type rubber mounts on the bellhousing or converter housing.

 

Sorry to hi-jack the thread here, but I've been wondering about this issue. I have a 1956 Chevy 3600 truck that originally had a 6 cylinder in it. I can see on the front cross member where in addition to the v6 holes, the holes were factory stamped for the V8 front engine mounts. I have built a 383 out of a 350 block from a '79 C20, which of course had side mounts. I was planning on putting a second cross-member in and using side mounts, but if I could use front mounts, it would look more traditional. Is it possible to use front mounts on a later motor? Who sells front mounts?

 

'57

 

The truck front mounts were just like the car front mounts, except that the brackets on the frame were riveted to the rear of the crossmember.

http://www.cl***icparts.com/1955-59-Original-V-8-Conversion-Set/productinfo/79-375/

note that this mount setup only works if you use the original bellhousing with it's big mount pads! if you swap in a modern auto trans with only a mount at its tailhousing, there's nothing to keep it from moving around, and you'd be better off adding a crossmember under the engine, and using side mounts.

 

cide1, Maybe this will help as far as the bellhousing and rear mounts are concerned.
http://www.stovebolt.com/techtips/engines/bellhousings.html
As squirrel said this will only be of help with a clutch/stick.

 

why do you ask? what are you looking to do in a 55-57 Chevy?