I'm doing some window shopping right now. Looking to add to my wish lists. 

Will be a 302 based engine, I don't know yet if it will be stroked or not, or actual power levels. I am however trying to plan as if I will be needing stuff for high power levels, if that doesn't happen then no biggie, I would rather have too much than not enough and have to buy stuff twice. Plus there is always the chance that I will upgrade the engine at a later point.

I've come across both return and non return regulators. My question is if both have outlets what is the difference? the one I came across so far that I would go with if I had to today states it is a non return, yet has 1 inlet and 2 outlets.
It has 1/2 inch npt and is alcohol compatible, and our gas here has alcohol in it, so I want to be safe. I plan on running 1/2 inch fuel lines.
The others are 3/8 inch npt and are not alcohol compatible. But state they are return style.

The non return style ones do not state they are dead head types. So I am a tad confused. Marketing terms or I've been told in the past that return types are better on the pump in the long run. I will be running a Mallory 140 pump that I already have from the old Lemans project. At least that is the plan for now.

So far I am only looking at Holley and Summit Racing brands. Just because I am familiar with them to a point, and know nothing about Aeromotive or the others. I am open to suggestions.

Thanks,
Russ