Y'all got rocket fuel at the pumps? Damn! We're missing out up NorthRockets. Or. Sails.

The problem in boosting is fuel. OP would have to throw in the marine intake and injectors. Rewire, throw in a fuel pump, tune, etc etc. Unless he is going all out and wants to be different, drop in a LS which requires most of the same.Ahhh, my bad, I thought it was earlier...2013 is still the old 4.3The new 4.3 is in the same neighborhood as the 4.8 was... So not quite the boat anchor it used to be... Actually, it's pretty close to the first gen 5.3....
So yes, boost is the only option... On the plus side, the procharger kit for a 350 bolts on, lol