Nickhop

My 2014 5.3L Sierra recently started throwing a misfire code on cylinder 4. After changing spark plugs, wires, and coil packs, I've come to the realization that my lifter has more than likely failed. I knew it was burning oil previous to the failed lifter, so shame on me for not putting 2 and 2 together. The truck only has 140k on it, so I'm looking at doing the AFM/DOD delete rather than just fixing the failed lifter. Planning to keep the truck for many more years. The mechanic sent me a link to the AMS racing kit which includes a Diablosport I3 Handheld; however, browsing this and other forums, there seems to be a number of recommended kits (e.g., Summit,Scoggin-Dickey) with a lot of preference for the one from Texas Speed. Hoping to hear some success stories. Which kit do you prefer OR would you steer away from kits entirely?