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.