Panic, I dont think that is a lot of duration. Clifford, Howard, Isky, all sold cams in that range describing them as nice street RV type cams. Langdon's Bull Dog cam I think was in the 254 range on the intake side and longer on the exhaust side, like 264. My cams on the other hand, at 284 degrees duration are pretty big cams. When I get home tonight, let me see if I can find one of my old clifford catalogs. His cams were usually pretty accurately described.
