A500 and A518 Parasitic loss

is your engine already built...what are the specs?
Soon to be 1986 318 truck engine. Stock rebuild. With 302 heads (stock). Summit 204/214 cam .421/.444 lift. Edelbrock performer intake. Edelbrock 650 AVS 4brl. GM style HEI ignition (with adjustable vacuum advance). Stock exhaust manifolds, dual exhaust. Nothing special, Just a driver/cruiser.