Welcome to the 4x4Wire!

If you already have the 3.4L installed, there should be no problem sourcing the FI parts for it...intake manifold, TBI, wiring harness, ECU, electric fuel pump, etc. It's a Chevy, most of these things will be in your local self-service wrecking yard or professional breaker.

Clay, another board member will check in sooner or later. He was a GM tech. Me, I am just an old parts guy.

1987 Raider - Roxy
1988 Mighty Max 2.6L Turbo - Pearl
1997 Mountaineer V8 - Freddy
2000 Excursion V10 - Freya