i have a 96 gmc sierra 1500 that i bought new and i'm about to put a new motor in but i have computer questions. what's the difference between the 96 computer and the 98 computer? seems nobody can tune the 96's other then hypertech(which i have and it's crap) and the 98 which efi live, hp tuners, and looks like just about everybody else can play with? can i just swap in a 98 computer after i have the vin changed or is there something else i need to do?

i was going to do a ls swap but for cash and time reasons i may just find another vortec block to rebuild and swap my heads and stuff onto. after 307,xxx on the block i'm starting to pick up just a hint of knock in the lower end and it's starting to burn oil