LS1 into 87 T/A WS6
Basically you will need to notch your stock k-member, or get a tubular setup, you will need a new trans x-member, a new fuel pump, fuel lines and fuel regulator under the hood, some custom A/C lines, new motor mounts (unless you get a tubular k-member), and some wiring work.
Thats the majority of it, like I said, do a search

