my old 350 had one timing chain, but i went with duals on the reman that i picked up, friday. will my old cover fit over them? i would check, but that cover isn't coming anywhere near my shiny (if grey can be shiny) new engine until i've thoroughly degrimed it. it got a little nasty on the old engine. also, i like the flat grey look, but how about a white engine, to match the truck? i don't think i've ever seen a white one.