T-56SLPSS

I just finished my rotating assembly tonight, hoping to have the motor in by sunday. my machinest recomended the comp 273lr cam for the 6.0 as a dd. the cam is installed so no second guessing now im just wondering if anyone has ran this cam because the numbers dont at all line up with other cams i have researched. 223,231 duration with .610,.617 lift????? seems a bit off but will be posting results soon