The typical location for the crack seems to be the passenger side of the front crossmember, on the "back edge", near where the motor mount "stub" bolts in. My question for anyone that has a cracked frame (or had, and fixed it) is: do you have a frame that GM had already "reinforced" in this area. If reinforced, on top of that location there will be a small metal plate, held in with two rivets (vertical), and also two of the bolts that hold the motor mount "stub" in place (horizontal). Those of you with big blocks, whether reinforced or not, have you experienced any cracks in the frame components in the engine bay, except those from the steering box of course? Trying to figure out if that small plate is all that is needed, or if by fixing that flex point, other problems crop up elsewhere. I'm thinking I may want to "box" the motor mount stub as best I can since it's already out, in addition to adding that GM riveted in plate. If the plate prevents any sort of cracking, even with say a big block, I'll probably just do that.