MTNTKs fix has works great in my personal experice. If its not too much more than stock and your set on redoing the top end, defiantly grab a kit for the pro!!!
I see the Weisco fordged pistons to be better than cast. As for the taller piston/shim kit, I dont see it creating any problems. Didn't on the dragons. Some claim to get more hp outa their motors too while running the fix kit.
The only thing I could see would b needing a new map. MAYBE.
If your not planning on rebuilding a top end, I don't see a need to buy the kit for the pro just to install it; based on how they have been preforming so far.
Sent from my iPhone when I should be paying attention at work