I have used a late model GM cruise control switch for several OD installs, about $10 at Napa. The wiring would be the same as the factory switch. Lower terminals (plunger end): pink to govenor and orange to relay. Upper terminals: green to #6 on solenoid and black to neg side of coil.
Fred

Last edited by rfs56trk; 09/28/2009 4:47 PM.
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine