[cayoterun]

Thanks, that explains a bunch.
I'm pulling the tranny from a '91 GMC 1500, so now I know what all to look for and make sure I get the stuff I need.
I'm gambling with a used tranny, but by using it, I at least get a core, tv cable, brackets, and all the stuff that I'd need. Buying a rebuilt, most or all don't have even a filler tube or dipstick. A friend let me have this one on the barter system, so can rebuild later if I need to.
I have all the other adapters located or in hand. Another friend is letting me have a 3:42 14bolt rearend, so I should have a top speed of around 90mph @ 2400. 60mph @ 16-1700.
The purpose is not go-fast, but hold rpm down.

edit: If I understand, By tying into the brake lights/pedal switch, It disables the converter lock until it drops out of overdrive, then when brake pedal is released, the wire is reenergized until brakes are applied again?? Correct me if that's not the way it works.

I learned alot of things on the other truck I wish I'd done different, so hope this can be an improved version.
Thanks again for your explaination.
Cayoterun