Suggestions for the Best Comp Ratio, Pistons & Cam for Street 340

id run the stock replacement hi comp pistons and the crane 278hmv or 278 powermax hyd cam.this cam has great manners and a powerband like a table top.specs are as follows : 278/290 duration 467/494 lift 114 lsa. crane lists the "basic rpm range" for the older hmv version at 2200-5800.i have this cam in my current 340 combo.it idles well and pulls good vac.pulls hard to 6000 rpms no problem.so long as i limit my total advance to 34* i dont have any issues running 91 pump swill.