First, what is it going into, vehicle type, weight, gear ratio, daily driver, ETC. I Have used the CC 268 Hyd in mild SBC 350, approx 8.5 compression and a two barrel in a 80 camaro with a manual 3 speed. I only used it because at the time it was a cheap rebuild and I had the cam on the shelf. It ran very good and was a daily driver. I was actually surprised because I haven't had good luck with Comp Cams hydraulic grind durability.