3/8” mechanical pump question

Ok , just to follow up on the fuel pump with 3/8 lines. Here's the response from Tony D'Agostino .

You were dead on RustyRatrod !! AllPar was incorrect.


".....Al
fuel pumps are the same as a regular 340
and the fuel lines were 5/16"
only 440hps + hemis got the 3/8" fuel line with a vapor return..."

Cheers!!