Fuel line ideas?

[marine02ss]

I have a 68 camaro Im working on.I have dual intank walbros with a -8 fitting out of tank.Where should I mount the regulator near the tank or close to the engine.Ive heard pros and conns either way.Its a Fuel Lab regulator should I run the return all the way from the engine?Its a 408ci with Kenne Belle blower,AFR225s,etc....Here are some pics of my project:

Couple more pics on the ground,mounted the Fiske wheels and the steering column.