just picked up a 302 Military GMC engine want to know if there are any aftermarket parts for the engine and any thing suggested on improving design flaws like the intake needs to be supercharged to eliminate the fuel dropping out and puddling in intake runners > is there a retro roller CAM and lifter available or what info on a engine builder need to grind a billet blank and what will be needed to make the lifters is there roller rocker arms or will that need to be fabricated anything else to suggest I plan to bore out to 4.125" and use a 8" ish rod and keep the crank at 4.00" but use a 400 SBC piston