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: Holley 800 double pump question Big Block Muscle Sep 30th, 07, 12:56 PM Carb question, I bought a choke kit to put on my motor. It has a 800 Holley on it There is no pump on the side of the carb (the pod with the diaphram in it.has the rod hanging down . ) I see 800 on ebay don,t have it Is it because it is a double pump carb. Thanks 427L88 Oct 1st, 07, 8:46 AM Thats not a pump, its the vaccum diapgram that opens up the secondaries on a VACUUM SECONDARY carb. Double pumpers dont have that. THe pumpers are located underneath the front of each bowl. Theyt have a small arm that sits on a cam, on each throttle rod. mr 4 speed Oct 1st, 07, 1:24 PM what is the list number on the carb? | ||