I think I have convinced myself to go to a roller cam, lifters and rockers in my 454 BB for my 67. I have done several cam swaps in both small blocks and big blocks, but never a roller cam. Not knowing much about this technology except friction reduction being the obvious gain, what do you guy's think? Are roller cams worthwhile? What kind of difficulty can I expect and how does the job differ from swapping a basic hydraulic cam. I respect all of your replies. Thanks in advance. Bill K, you out there?