Ok so everyone says that vortec blocks and cast heads dont flow good.. change the cam and you wount notice much as the heads are the weak point.. so what years and off of what kinds of vehicle would we want? my fathers friend owns a junkyard so I can get them cheap.. hopefully less than $100 if he has a blown motor there....or hell maybe he will just sell me the entire engine... dunno yet.... I just need to see what I need first.. since I bought a winch and havent mounted it yet.. I still figure that a ok driving truck is good.. if I get stuck in mud.. I have the winch to pull me out.. so no need for 400hp+ my truck is not a daily driver however i do want to drive it to the pit and back... so mileage is a concern.... with a 1991 chevy caprice police 350 (9c1 nothing special) I was thinking Comp Cams Xtreme4x4 cam, vortec heads and a new intake.. that should freshen it up enough.... or just the heads and intake and leave the cam alone... stock the ening is supposed to be 195hp/295ftlb torqu with tbi, manifolds, single exhaust.. I put truck avenger, 1989 z-28 intake, full headers and true duals... so what ya think??? vortec heads, camel hump? others?