Fuel system design

[Pyrotechnic]

I did a search for this info and I found this link here: http://www.centuryperformance.com/fu...e-spg-140.html

I have a 450-500HP 383 being fed by a Holley 750 DP.

My fuel system right now (temporary just to get me down the road):
Holley Blue pump hooked to stock sending unit pickup tube, feeding the stock steel fuel line to the engine. The regulator is a Holley 12-803 deadhead style.

Based on the info on that page with those stock steel lines, my fuel system at this point is only good for 250HP ?

Future fuel system:
Holley 12-803BP return style regulator
-8AN supply and return line
This filter after the pump:
http://www.summitracing.com/parts/PFS-10100/
This filter before the pump:
http://www.summitracing.com/parts/PFS-10214/
I'm going to weld a sump to the stock tank and that will feed the pump.

Based on that info, this setup should be good for 700HP and it should make that pump last a lot longer because of the return line.

Is this the route I need to take or is this overkill ? I'm asking because this is going to be a pretty expensive project to complete.

The biggest cost is going to be running the -8AN line for the supply and return. I have a square body and I chose to make the drivers side tank the primary tank. If I run the lines on the passenger side like factory, they have to cross over between frame rails. If I run the lines on the drivers side, those lines end up shorter but the supply line from the regulator to the carb will have to be slightly longer since the carb is passenger side inlet. I am leaning towards doing the lines on the drivers side. What do you all think ?