First are you running a I6 or V8? If it's a I6 time to use 2 barrel bracket that's modified or make your own. The best I6 set-up I saw was using a clip off the shifter linkage on the trottle rod to close the switch at the carb.There is a place called C&P Automotive in Kulpsville, PA that might be able to help, the phone number is 800-235-2475.
willy 57