Fuel puddling, AFB 750, primaries siphoning?

fshd4it said

I was planning on running a return-type regulator. There's a cheap Holley dead-head unit on there now, I just need to decide which one to buy, and where to plumb the line into the tank. I welded a sump to the stock tank, so there's an extra port on that... or I could pull the sending unit (which actually works) and put a 3/8" nipple or bulkhead fitting in that.

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I wouldn’t put the fuel back in the tank through the sump. I out my return line fitting in the upper corner, passenger side of the tank.

The area of your vent should be at least the area of the feed line from the pump to the regulator and one size bigger is better.

As the fuel is returning to the tank it generates an incredible amount of vapors and they need a place to go.