Motor mounts
 

Can somebody tell what these motor mounts fit and can I use them to install a 455 in my 70 Formula. These came in a box of parts that came with the car. Thanks

Hard to tell what body style they came from, there should be a code stamped into them, Those later style mounts came in B-A-F, and G body styles that all differ slightly in hieght.

If they are F-body mounts they should work on your Formula with the correct style captured frame mounts.

^^^ Yup.

There's AT LEAST two different styles. He says there's several different styles, and I can't contradict that.. What I know from experience is that the Fullsize mounts are taller than the F-body mounts. I found that out the hard way.

70-74 f-body don’t use that style mount.

There should be part #'s stamped on them that will identify what they are from... i started a thread not too long ago that someone posted some numbers. Google should help too.

Edit- https://forums.maxperformanceinc.com...d.php?t=882596

You can use them, just order the correct frame side mounts to pair them with. 70s have steel clam shell style frame mounts, later cars have a steel and rubber combo mount.

They look too tall for Firebird. They look like "B" body mounts.

OK so we are saying these are not correct for 70 Firebird Formula . I media blasted them and can not find any numbers. Sorry guys but this will be my first time installing a motor.

The metal mounts that bolt to the engine are NOT compatible with those frame mounts.
 

You need a pair of the 1970 rubber & steel motor mounts.

Part numbers are 2335 and 2336.

They bolt to the engine block and sit down over that frame mount.

Then a long bolt goes through the motor mount AND the frame mount (both) from front to back.

My understanding. Here are the frame mounts used. https://butlerperformance.com/i-3164...tegory:1393553
Here are the engine mounts: https://butlerperformance.com/i-2445...tegory:1393553
This is what my 72 Firebird has.
My 76 Trans am has those other ones pictures above. With the clam shell frame mounts. https://butlerperformance.com/i-3016...tegory:1393551