I used to run the Aeromotive 11203 "street rod" pump w/ -8 line from a sumped stock tank to a deadhead regulator. It worked great running mid 9s at 140 mph, but on the street I had vapor lock issues w/ pump gas. At the track I never had any issues w/ vaporlocking, just had issues driving it on the street.

Switched to the bigger Aeromotive A1000 pump w/ a -10 feed and used my old -8 line for the return. Obviously I used the matching Aeromotive return style regulator up at the carb. Didn't run any faster (didn't expect it to) but it did help a LOT w/ the vapor locking issues I was having before.
I've since added a fuel log w/ a total of 3 regulators for the nitrous. Very happy w/ this system.