I know some of you lucky guys have put BB power in your blazers. What type of modifications were required to fit it in there? I just got a beat up 72 truck and was thinking about putting a 454 or 502 in it. Down the road sometime I plan to yank it all and put it in a 1st gen blazer. I assume the engine compartments are relatively similiar so I figured I would take my first crack at it with this truck. What major issues am I going to run into?