Stock roller cam on a \'91 350? Hey guys, A friend of mine insists that my '91's 350 came with a roller camshaft setup from the factory. I can't find much info to confirm or deny this, so I was wondering if one of you can shed some light on this for me. I did see a rebuild kit for a '91 350 truck motor that said "not for roller cam". Was it a option, or was this just for high perf car motors?