If anybody is having any drama with the reverse lockout solenoid [which is normally operated by the ECU under a certain MPH]
The normal bypass method is to use power from the brake light, but in Road Racing [my passion] when downshifting from 6th to 5th while hard on the brakes can cause you to Money Shift into reverse.
The other method is to cut the spring in the lockout solenoid.
Over the weekend I helped do a T56 swap into a friends 55 Chevy racecar and we came up with a novel solution.
Firstly the solenoid is only a 2 wire electromagnet that only draws 1amp. It doesn't care which wire is + or -.
We put a brake light switch on the clutch pedal and ran a wire from 12V to the switch and from the switch to the solenoid.
From the solenoid we ran a wire to a RPM activated switch then to ground.
The RPM switch was set at 2000 RPM for 4 cylinders which equals 1000 RPM for a V8 [this was the lowest RPM module we had laying around]
The RPM switch was wired so it is normally closed and the circuit "opens" above the set RPM breaking the circuit.
without pressing the clutch pedal there is no 12v to the solenoid, and above 1000 RPM there is no ground from the solenoid. This method allows for Downshifting on the track without money shifting.
The engine can idle normally without the solenoid being activated until the clutch is used.
It is Cheap compared to those computerised adaptor modules. And is easy for those Carb and Distributor guys.