Just changed my engine from a 5.7 EFI to a stock 502 Mag MPI. Anyone know if the existing 3/8" fuel line will be large enough to feed this thing or should I go to 1/2" ?

Thanks

Don't think the line size is a problem. Just make sure the pump will supply enough. You shouldn't need to get up to 1/2 line until 600hp or so.

Ditto.....the 3/8 line is plenty....you don't need to go to 1/2 until you get much bigger horsepower like major cubes or blower motors.

Thanks guy's, that pretty much answers my question.

Rick