Re: TCC Brake Switch circuit
Full disclosure, I have not done an LS swap. But...I have done both a torque converter lock up and a 3rd tail light conversion in my 67. IIRC, I used either an S10 or early 80's Camaro brake light switch for the TC. Mechanical threads worked. Color code on the brake wires were the same. Made a small adapter pig tail for the TC. But you could cut and crimp wires.
The later 3rd tail light used an brake switch after '86 (of course) from a full size B-Body (Caprice, etc.). honestly, I think my 90's ZR-1 switch would also work. Not suggesting you should do the tail light. The point is that a later switch is an easy swap. Pay Help! brand, Napa or used prices.
90 Corvette ZR1
TC# 3094 ACES# 7297