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what is the difference between a 4144 and a 4670 holley carb? I'm running a 4144 and still having problems with it. Is a 4670 a better carb? It's on my 75 440 with a mild cam. Thanks

I'm still having problems with my 6 pack. It's a newly built 1975 440 with a mild hydraulic flat cam. 462/470 lift, 262-270 duration, 218 intake,224 ex. rpm 1,300-5,600. 4500 ft elev. Can't get it to stop strutting at low or high speeds. It's driving me crazy. It's not bad, but I know it's...

does the center carb on a 6 pack need to be hooked to the valve cover? I'm having problems when at crusing speeds. It studders a little. - - - Updated - - - There's one at the top and base of the carb. I have the one at the base plugged off and the top open.

OK! I have almost got my 62 440 running like I want it to. I now have a problem with the new rebuilt motor (30 over) stumbling at around 3k while driving. I have new 906 rebuilt heads, new xe-262h-10 cam at 462/470 lift, 262-270 duration,218 intake,224 ex. It's a hydraulic flat cam. It has new...

Well hello everyone that helped me out with my fuel problem. It seems as if I have found the problem with help. I pulled the fuel pump push rod out and it was only 3.00. Not the 3.222. I have one on order and will change it out. One end of the old one looks like it was grounded off. Well thank...

I'm running at 8lbs now on my 6 pack 4144-1, 4365-1 carbs. I was told that 5-7lbs are the best range to run. I have a regulator and going to put it on the get the 5-7lbs. Any thoughts about this from some one that knows the 6 pack pressure range. All help would be nice. Thanks,

I'm thinking of putting a electric fuel pump on my 440 6 pack. Any ideas to the kind I should use.

Here's a dumb question, does my 62 dart need a vented or non vented gas cap. The locking cap I have on it now is a non vented one. Thanks

My fuel pump is leaking. I want to replace it with something good. I have a 75 440 6 pack with a mild cam. what would be a good match for this. Thanks

Does the Holley 4365-1 carb have jets or is it a metering plate? If it has jets where are they located? Where do I find a diagram for the carb. Thanks

I just got new Holley carbs for my 6 pack set up. I have a 9-1 comp, 30 over and a 6pk hydraulic cam. Motor has been balanced. I'm new to the Holley 6 pack system and not sure what would be the best Jets to put into them. Any help will be good. Thanks