Well bummer, it looks like I was in a rush at the junkyard and ended up pulling everything form a 2.8L V6, not the 4.3L. From what I understand the difference is in the injectors and the TBI bore. Taken from Bill's website:
Injector sizes-
Color code Black/White
Engine 2.8L
Flow lbs/hr @ 13psi 33
TBI bore 35mm
GM part # 5235430
Color code Yellow/Blue
Engine 4.3L
Flow lbs/hr @ 13psi 45
TBI bore 43mm
GM part # 5235203
Is this going to be a deal breaker? I believe the wiring harness and the sensors should all be good. But I may have to get a different TBI...