Ok. Now, once again. stock 305, but I put a edelbrock rpm performer intake and a 1401 edelbrock carb.( 600 cfm) What sise cam should I get to help increase my power. nothing too large but large enough to hear but just right to light em up hahaha. I want to keep the 305 because it came with the truck and i want to keep the orig. motor block. so no 350's here. how do i get kick a_s power out of a 305. O- does anyone know what sise my stock cam is--1982 silverado. I was told I could change my rocker arms with difrent ratio to also act as a cam swap. ever heard of this?