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Leon Rennebaum · 11-29-2016, 12:11 PM

Since no one else has replied I can only offer information from CD Catalog Vol. V from 1980: The only grind that comes close is Part No. 20871, Grind No. S-290 300-06 which is 290/300 degrees duration at ramp, 255/265 degrees duration @ .050", .540/.562 lift, .026 lash int/exh. It would appear that the grind no. is simply the intake ramp duration, exhaust ramp duration, intake centerline (in this case 106 degrees). This grind is listed as a competition solid lifter cam. Not sure what the 263 is! Hope this helps!

11-29-2016, 12:11 PM	#2
Leon Rennebaum Junior Member Join Date: Oct 2008 Location: Williamstown, NJ Posts: 30 Likes: 2 Liked 0 Times in 0 Posts	Re: Cam Info Since no one else has replied I can only offer information from CD Catalog Vol. V from 1980: The only grind that comes close is Part No. 20871, Grind No. S-290 300-06 which is 290/300 degrees duration at ramp, 255/265 degrees duration @ .050", .540/.562 lift, .026 lash int/exh. It would appear that the grind no. is simply the intake ramp duration, exhaust ramp duration, intake centerline (in this case 106 degrees). This grind is listed as a competition solid lifter cam. Not sure what the 263 is! Hope this helps!