OK, this is my nickel's worth . .
You have a system called most of the time, a "Vac-U-Pan" (commercial name) which was first seen about 1970 or so on engine installations by Roy McClintock in Albuquerque and Rehyer-Morrison . . If you have the check valves in the lines to the headers, and a good baffle at the valve covers, you shouldn't suck oil. And if the installation is done correctly, it should pull up to about 5" of vacuum . . again depending on how tight your engine is and how well it's sealed up in the gasket/seal department . .
On the competition, at roundy round races, most of the high buck guys have far more HP than they can get to the right rear tire and use . . make your car handle right up on the cushion, learn to pass where nobody else can, and make more torque than HP out of the corners . . You'll win a lot of races!