Here's what I did. I had a very thirsty 462, ported 6x, Quadrajet intake and carb also ported. It used to run half way decent. I decided to have the stock 1964 B body tank sumped with two outlets. I ran two 3/8" steel lines to a 3/8" tee in the Carter mechanical fuel pump. I also had a 1/4" return line back to the tank to keep the fuel moving.. Wow what a difference! It was like I put a brand new 455 in my car..
The issue with the mechanical pump is feeding it. A guy that designs fuel systems told me to use two 3/8" steel tubing runs instead of one 1/2" run. He said you are pulling not pushing liquid, the rules change....
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