Well, just got a SB Dual Disk installed, along with some Mach 6+'s and a Smarty. I haven't driven the truck yet, but I'm guessing I'm at the outer limit of my 62/12. Will upgrading to a 64/14 be feasible by sending in the turbo for modifications or just buying a brand new one be an easier route. Thanks for the info guys.

You'll probably have to call HTT to see what they'll do for ya with regards to uprades, I suspect it will be easier to sell your charger and buy a new one.

to save money i suggest driving it first.. after that then maybe a 64 is the way to go but u might just need a exhaust housing change to keep egts down