Besides the obvious "home inspection" lol..... I guess I'll say it this way. IF I pull the stock, untouched 360 heads (1.88), will I gain any performance by bolting on a set of these unported, SM heads? If I don't, they are not worth their weight in aluminum. IF they bolt on 25-45 hp over my stock heads, my 40% discounted heads were "mission accomplished".
