Upgrade fuel system

I want to upgrade and restore my fuel system to new on my '71 Scamp. It needs it badly. I have a Holley 4bbl 1850 on the 318, and have been running it with the original 5/16" line adapted up to 3/8" to fit the carb hookup. Since I need to redo the whole system, I want to run 3/8" throughout from tank to carb. What all do I need to make this happen? Obviously the sending unit and fuel pump will need to be 3/8", but where exactly can I find these parts for the most reasonable prices? I just want to run this for now as a decent street crusier with a little bit of 4bbl carb pep. But there are some forks in the road that I'm running into.

Fuel tank: which type? I've been finding that there are two types of vapor/vented tanks for the '71 years. (4 and 1?) Does it really matter which I have or is that just for emissions that were coming about in the early '70's?

Fuel pump: best to go with stock type? mechanical or electrical? at engine or at tank? again I just want to get this for some typical street driving right now, no fancy stuff. (Someday when I rebuild or drop in a new engine....) I've been looking up some that have higher psi but I believe that's just for serious racing and then I'd also need a regulator to drop the pressure down.

Anything else I'm missing? Jeez, I figured this would be a relatively simple job but after looking up pricing on various fuel system parts there's more options than I realized.

Thanks!