me to for higher RPM/spirited driving I think adequate area on the suction side is important (1/2 pickup & a bit more mods upstream). I want adequate area (pressure side as well)/correct bearing clearances/correct (as light as possible) oil weight/bypasses as some journals can be starving tho the gauge at the beginning of the system (rear of the block) shows an adequate number) THEN see how much pump/spring I need to obtain enough psi