[scottj]

Fuel pump and fuel line minimum requirements are based on HP.

The basic rule of thumb is:

up to 375 HP requires a minimum of a -06 line.
376 - 550 HP requires a -08 line
551 - 800 HP requires a -10 line

For a deadhead system the formula for determining the minimum fuel pump GPH rating is:

HP x .23 = GPH

example: 525 x .23 = 120.8 GPH

For a return system the formula is:

HP x .17 = GPH

example: 525 x .17 = 89.2 GPH

The next component after the regulator should be the carburator.