250+ duration is going to run like hell under 3k add 11:1 onto that and you have close to my 388 91-93 octane only and idling/driving part throttle especially off road it's not going to be fun. That cam has such big duration to allow that high of a CR to run on pump gas even if it is premium and it isn't going to clean up until over 3k which isn't conducive to low rpm/small throttle inputs. Hed be better off in the 220-230 range and dropping a point of compression, so it has better manners at low RPM/light throttle input. It also will not have much vacuum for the brakes one pump maybe and bye bye power assist. That's why mine has Hydro boost.
Mine is a modern roller version of his cam 252 .600 110 vs his 250 .500 110 the duration and lobe sep will act just like mine just not as much lift. It hates anything under 3k.