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Thinking of upgrading the fuel system on my Duster. It is 418 ci. with ported eddy heads. It has an Air Gap intake with a 750 Holly carb. I instaled a 3/8 pick up and fuel lines. Currently I am using a mechanical Carter pump. I have been told numerous times that I will not have enough fuel at the top end. Does someone make a better mechanical pump or should I change to electric? All advice is appreciated.

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There are numerous mechanicals pumps made for Hi Po applications, the one true way to test your fuel delivery sstem is to be able to fatten the jetting up enough to make the car slow down in the 1/4 mile on the MPH. You can also try installing one or more new spark plugs and go out where it is safe enough to floor the car in high gear for a 1/8 mile or more in high gear and then stop the car as soon as possible and pull that plug and take a good hard look at it, richen the jetting up again until it makes the plug readings start looking rich. If you can't fatten the jets up big enough to make the plugs read rich your running out of fuel in high gear. BTW, if it starts popping or missing or noses over let out of the throttle and fix the fuel system Another BTW, if you have to add a electric pump buy one way bigger than just big enough to handle what you got now, you know you may want more power later

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All advice is appreciated.

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Thinking of upgrading the fuel system on my Duster. It is 418 ci. with ported eddy heads. It has an Air Gap intake with a 750 Holly carb. I instaled a 3/8 pick up and fuel lines. Currently I am using a mechanical Carter pump. I have been told numerous times that I will not have enough fuel at the top end. Does someone make a better mechanical pump or should I change to electric? All advice is appreciated.

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