[Johnny406]

Still plugging along on my motor swap project. I'm sticking my old 400 bracket motor into my previously SBC powered 81 T/A. I am now concerned I have the wrong motor mount brackets for the engine as these brackets don't fit well at all in the motor mounts I picked up this morning. The motor mounts I just got align in the frame holes perfectly but don't line up with the engine brackets. The SBC mounts line up perfectly in the engine brackets but not the frame. I tried to compare the mount brackets with my 78 T/A and it "seems" that the brackets in the T/A are a little shorter and have a different mount end on them.

[HoneyHush]

On the top of the engine bracket there should be a little letter stamped into it. Firebird mounts should be stamped "F". The brackets you have seem awefully tell. I have big body mounts in the garage. I'll go look at them and post a pic on a mount if I can to compare to yours. Can you see the stamp code on the engine bracket? They look very similliar

[Boostedbird]

Yeah, those don't look like the f body block mounts. Do they have a part number or like Honey hush said a letter stamped in the top? I'll look and see if I have another set of brackets left.

[ksnuclear]

These are from a 78 TA I used to own. I think these are what you are looking for. Don't know why the pics are upside down.

John

[Johnny406]

Here is the driver side mount, from the center of the top mount hole to the center of the thru bolt hole is 3 3/8 inches. I scrubbed it pretty good and there seems to be no part number engraved in it.

[STEELCITYFIREBIRD]

I have a set in hand for my 76 F body 400.
I have 2 3/4 as measured in your first pic.
F 496893 on one
496892 on other
http://transamcountry.com/community/...?topic=67718.0
https://www.google.com/search?q=4968...496892+pontiac
Hope that helps!
#'s near top block bolt, outboard from mounted position.
anything else before I put them back in shop?

[74Grandville]

Originally Posted by Johnny406

Still plugging along on my motor swap project. I'm sticking my old 400 bracket motor into my previously SBC powered 81 T/A. I am now concerned I have the wrong motor mount brackets for the engine as these brackets don't fit well at all in the motor mounts I picked up this morning. The motor mounts I just got align in the frame holes perfectly but don't line up with the engine brackets. The SBC mounts line up perfectly in the engine brackets but not the frame. I tried to compare the mount brackets with my 78 T/A and it "seems" that the brackets in the T/A are a little shorter and have a different mount end on them.

going from eye sight I have a feeling those brackets are for a B or G body, not an F-Body. where did you get them? if they were on the original engine, what is the date/engine code on it?


I just took a look at mine and I have the same numbers as STEELCITYFIREBIRD. mine came from a 1979 301 Firebird.

[Skip Fix]

I think he is right B or G body.

[72projectbird]

I had the hardest time getting F body Pontiac mounts. I wound up with 3 pairs of random Poncho mounts before I got the correct ones.