The intake should help a bit, as the beer keg is really tuned for 2000rpm and under IMO. However with it's long runner lengths I wouldn't expect the M1 intake to compete with it in the Low RPM range. Also to me it sounds kind of silly to dump $1000+ into a new calibration, intake, headers and custom exhaust when the cam is your biggest hold back. You're paying for the retune either way so why not have it done for a new cam too? Roller cam regrinds are not that much money, around 150-200 bucks I think. I would expect a 5.2 with a mild cam regrind plus the intake and exhaust mods to be around 330hp, maybe a little more depending on how much of a cam you want. Leave the stocker in there and probably would slice 50hp off that.