hi all, i'm just looking for an opinion or 3, i want to put a 1985 4.3 efi into a 1976, any suggestions how to integrate the 'BRAINS' into the older wiring harness?? thanks in advance

Panless wiringPainless (www.painlesswiring.com) makes a wiring harness that will fix you right up. I have used this product and found it very easy to use.

I agree with previous post,
pull entire old harness and install harness to make the swap correct.

A little effort now will save more work than you can imagine!!!