Hey Folks, Newbie here. I have been looking for a '57 restoration project, and I recently got a lead on a 57 that had been disassembled and partially restored. Most of the parts need to be reinstalled--something that is well within my ability (provided I can find good parts and service manuals that can help me). Anyway, the current owner pulled out the original 292 and had a 312 engine custom built. He said it was bored out to 335 c.i.d. and assembled with aluminum heads. My question for this forum is whether the 312 is a drop-in replacement for the 292, or if I will need to have new mounts installed/welded on to the frame. If anyone on this forum has done this engine swap I would appreciate any input.