Yeah your correct c1500. All this new to me. So I'm still rounding up all I'll need. Thanks. Where's the best info on what wires I'll need to junk on the harness.

Sure is a lot of info around here it makes ones mind hurt.
Few questions. Hope it's OK to post here. I have a 71 c10 350 installed a 700r 3:73 gears. I am robbing tbi system from an 88 c10 305 700r....