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I would suggest a 3/8" min supply and the same for the return.. if your going with EFI it will need a good return.. I myself run a 1/2" supply and return with my set up.. it was carbed but now I run a Holley multi point EFI and the system is good up to 700 hp.. if I were to go more than that I would need a bigger pump and injectors.. the rest will work... the issue with a 3/8 line that I dont like is the bends.. if you get any kink at all it reduces the flow... the ID is already 5/16" on a 3/8" EDIT Also... if you keep the stock tank I would add a sump to it... injection doesnt like to have air sucked in and if you run low in the tank it will suck air in
Bigger is better when it comes to fuel line sizes, my next race car will have a 5/8 O.D. fuel ine with a 1/2 minumim return line, that is Carbureted, not EFI I'll put on what ever size the fuel stystem, probally Magnafuel, company recommends ![](/ubbthreads/images/graemlins/thumbs.gif)
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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