Correct fuel line set for 1971 Challenger 440 6 pack

[rmance]

What size are the fuel lines needed for 71 440 6 pack? Is there a return line needed? What size?

 

[Challenger RTA]

My understanding is that the factory fuel supply line from the gas tank on 6 bbl and Hemi cars is already the larger 3/8ths vs 5/16ths line. I would go anything less.

 

[cuda joe]

they sell kits for the 440 and hemi that come with the fuel ; return and the vent line

 

[sixpactogo]

3/8" fuel line with 1/4" return. The design was mostly to alleviate vapor lock on 440 and Hemi engines along with the vapor separator shown in post #2

Note: I would not use the filter type shown in the last picture unless it has the metered orifice for the return. Most of those filter units do not have that smaller orifice and will send too much fuel back to the tank starving your engine.