I am building this system now. Wiring etc. & getting ready to fire it up soon, I hope.
Donor vehicle, 1991 Astro 4.3 V6 262 TBI Throttle Body Injection
700R4 Transmission. Also used the steering column, brake pedal & booster. Bought a Painless Wiring harness for this fuel system.
If you read the manual it will tell you what computer you need to match up this harness. I got mine in a scrapyard for $50.
http://www.painlesswiring.com/webcatalog/largeview.php?SearchField=60201
This is the manual for this application http://www.painlesswiring.com/Manuals/60201.pdf Lots of good reading to help you in your decision.
Appears to be a simpler set up, only 2 injectors..
Everyone tells me that this is a good choice for a cruiser.
Hope this helps.

1951 Canadian Chev 1/2-ton Shortbox