HUH?

I think maybe you are thinking about the 3 bolt engine mounts the 2 gen F frame engine mounts used. The 70 A still used the 2 on the motor even though the motors started coming with all 5 somewhere in the ballpark of 70.

I suggest the trim tag codes be supplied for paint verification :)

For what I see, it's a 10 10 car with 250 interior. And my guess is 400 engine.

Steve, 455 used the 3-bolt engine 'insulators' and specific frame brackets or mounts,even in the A-body. If the car was an original 455 car, that 67 400 block would not be sitting on those frame brackets unless someone changed to the 400 brackets, which is unlikely. All 455 cars used the large mounts.

I have sure never heard of this, pictures?

the car was built over 40 years ago, anything is possible in 40 years.

Wankers, after digging out the old Catalog it shows the Insulator 70-74 All A/455 using 478678-9 which is the same as the 2 Gen F. The Bracket information had long falling out of this version catalog I have so I can't see what the correlation is there.

Something I never knew and I find this very interesting.

Is this what you want to see? This is my '70 455 frame.

I don't know, you would have to tell me because I never knew or have seen this.

Found this listed as the frame mounts and look like what is in wrongway's.

https://s3.amazonaws.com/gearbox-yea...s/p/pc7072.png

look at the frame brackets, those are specific to the big engine.

those are for all 70-2 A-body with 455

I don't have a picture of the standard 400 mount, but the 455 mounts are farther forward on the crossmember and actually hang over the front by an inch or so. I remember reading that the 455 frames also have a different part number because they had to drill the 6 different holes to mount the brackets.

wrongway, yes I picked up on them hanging off. I don't need a pic of the normal ones, very familiar with those.

why did the 455 have to sit diff than the 400????

My guess is the Pontiac Engineers decided the weaker mounts of the regular 400 would not hold up so they ran the big car mount. Since that used the three forward hole Insulator Mount on the motor they had to create a forward Bracket Mount for the frame.

This is all a guess of course.

As well you have enough of these you should be able to see one first hand ;)

% As well, the same Motor Inuslator shows to be used on 70-74 F. I just don't know if the Frame Bracket was the same. Chris thinks the 70 TA used even a different set up, but I'm thinking maybe not.

the frames had the same holes in the same locations, just a different mount. I know they had a different p/n for the 455 frame but you tell me the differences. Not much.

455 had more torque and needed a physically larger mount to deal with such torque or perhaps they were switching over to a new , larger mount anyway and the 455 was a new engine for 70 so they applied the change to that block.Johnny Z would know.

Wankers, wrongway's frame has those Brackets mounted well in front of the typical 400 Bracket. At least it looks that way to me.

What about the car? Did the OP buy the car? Was it a Judge?

How long would be a reasonable amount of time for me to wait before I call Jim M. & hook up my trailer? ;)

Yes, it appears everything is located forward but the engine sits in the same location.

you need to spend some time in the northeast, Steve, among all the 455 cars