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I rebuilt my holley 650cfm double pumper carburetor (List 4777-5) and after reinstalling it, the engine had a high idle and unresponsive idle adjustment and idle mixture screws. I pulled the carb to verify the transfer slots on the primaries and secondaries were not over exposed and I noticed...

Holley 4160 750fm/vac secondaries w/metering plate List # 80508-1 Pulling apart my holley 4160 carb on the secondary side and I noticed that the holley gasket was actually blocking off an open hole on the carb's main body. Can anyone tell me what the purpose of this hole is and if it should be...

Have a 72 demon that was originally a /6 225 with the charcoal canister in the engine bay. I put in a 360 and removed the canister but I'm not sure what to do with the line that ran from the gas tank to the charcoal canister. As it sits the line is still in place running up to the engine...

Well after years of owning my 72 demon and driving it only a few hundred miles I finally went out and fixed my broken gas gauge by replacing the sending unit. I took the maiden voyage to my local gas station and filled her up. I think it took around 13 gallons or so (it was basically empty...