put 12v to common on switch and run wire from normally open terminal to transmission selonoid when primary carb secondary butterflies open it hits switch to close sends voltage to trans plus its adjustable to when tou want it to work later or earlier
switch also works with single 4 barrel also think it was 35 dollars from summit racing lots cheaper than original comes with bracket also
That switch is a very commonly found pedal switch on heavy duty trucks. I would guess the mounting bracket is a specialized item. Tom Mooney
