I'm a newbie. Woohoo. I'm going to pick up a low-mileage Vortec 5.7L & 4L60E combo with the wiring harness & computer for $1500 on Saturday. The cab, bed, & 1/4 panels have already been removed from the truck. My question is, do I need to know any specifics on making sure I get everything. I've never pulled a late model engine a computer and all that new-fangled gobbledy-goop. Please help a newbiw out. Thanks, Robby.