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I'm sure this has been asked (and debated) here before, but here goes anyway.

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fire away there is no quota here . As said electric: bad is the noise (need to insulate it)/long wiring to it. Good is it combats vapor lock & would prob let you run a return line for that prob also and gives alot of GPH (w a large line). If you can flow enough w a mechanical that'd b the way to go for simplicity & some of em flow alot. I used a stock parts house low po "airtex" w 5/16" lines on a circle burner SB 360 (9-1) CR 2bbl (class rules) w no starvation issues at 6300 RPM at WOT though I went to a 3/8 line and drilled out/added 3/8" nipples in the in/out barrels on the airtex just to make sure that I wasn't getting starved though I confirmed that w a psi reading & there was no change so the b 4 setup was adequate. Mech is adequate in most cases & much better to deal w/setup