I have a electric fuel pupm mounted under my gas tank(when i bought the car it was in the engine bay, and it was too much for the pump to handle and it gave out). I bought a pump just like it at autozone, the $45 one for v8 engines. When i try to race on anything too much my car sputters and dies, so i have to pop the hood and suck on a gas line to prime it again, what should i do? Get a better pump and regulator?

Get a walboro 255 and be done with it. There around $100

How good are they? Do I need a regulator?

do you have a tpi? I believe the have a return set up at the rail.

no mines carbed, and in shop class we made the return line the fuel line

Thats odd. Sounds like your pump aint doing its job. I usually mount them just in fron of the axle where the fuel line comes down from the tank. I'd try a better pump and of course mount it low. Make sure all you clamps are tight so that you're not sucking air.

Detention time.

Drop the tank, install a good pump like the Walbro mentioned, use a return-style regulator like a Mallory 4309 to drop the pressure down to a carb-friendly 4-7 psi, and use the supply line as a supply line and the return line as a return line.

I have a summit inline pump mounted above my gas tank and it does fine on my 355.