Originally Posted by dvw
My bet is it needs a tps bolted to the linkage. Probably a GM sensor. The three wires are 5 volt feed, reference,and ground. This way the pump will increase volume with throttle opening. Also assuming fuel pressure should be set with the throttle lever at wot.
Doug

Thxs Doug coffee Been researching this and found out that Holley actually sells a TPS for the 4500 series carbs. Reading though some of the commits on the tube someone mentioned DWM any ideal what that stands for? work