T3/T4= the turbine(hot)side of the turbo is a T3, the compressor side is a T4

u can find a set of ls cams for less than 20 bucks, i would use those and make some money off the ones u have now.

and ronin is right, u want more lift instead of duration. duration is the amount of time the valves will stay open per cycle, if theyre open too long you increase the chances of higher cam overlap(when the intake and exhaust valves are open at the same time) and the boost can just blow right thru the cylinder and never be combusted.