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I have a street/strip 440 with 175 hp shot of nitrous and I'm having trouble finding a reliable, quiet, and performance electric fuel pump. On two different occasions I have used Mallory Comp 140's, and also tried two different Carter 4106's. I have a return system in place and the pump is...

I have a Holley 750 double pump carb on my 440 and of lately it has developed an issue that I'm seeking help with. Off idle it isn't as responsive and the problem seems to be in the transition from the idle circuit to accelerator pump. Also, at highway speeds I'm noticing a flutter out the...

I suspect I have a vacuum leak through the secondary throttle shaft of my Holley 750 DP due to wear. I'm contemplating a base plate change out. Anybody have experience with Holley carbs or recommendations on which brand to put on?

I have Holley mechanical secondary double pump carb that has the choke horn milled off. The numbers I do have are P 46 on the driver side of the main body and R 24 on the passenger side of the main body. Also I have 172 on the primary throttle blades and 173 on the secondary blades. I only...