I took out the 305 Tbi junk(no power) and put in a Carb 350. How do i get the Overdrive to kick in without buying the overpriced wiring harnes thing from painless wiring or B&M Overdrive unit. They cost about 200 bucks. I still have the original computer could i rig it up with a switch or something?  

Hey Guy

Scroll down to page 15 of our community forums the second one down on that page is a trans tcc wiring blog that i wrote. See if that is what you are looking for. If you have any questions just ask.

p.s I hope this works for you.

Lee