When I got my Firebird, the original 350 was gone and there was a 1977 400 in it's place. The motor mounts appear to be home built welded in deals and the engine is not positioned exactly right. I want to put in original 69 motor mounts but I don't have any specs to go by for installing them. Can anyone point me in the right direction to get that information? I have the tranny out now, so it's a good time to resolve this issue.
I ran into the same problem with my car, I had no mounting plates on the frame to go with a 76 400. If your 77 400 block has all 5 motor mount holes on each side threaded like mine does than Ames sells what you need. I just bought the same thing, $155.00 to the door, it comes with both frame plates, the rear support brackets, and some awesome looking motor mounts. The guy at Ames knows what he is talking about, I looked everywhere for something that would work and nobody but Ames had it, $155.00 ain't cheap but the stuff is real good quality.
Thanks for the reply. That's interesting because I do have plates as part of the existing mount. Do you have any pics of what you bought? Did you already install it? The pics online at Ames cannot be relied on for accuracy. Did it come with measurements for determining where they should be welded on ?
