just like dieselnut said i'm getting a new tranny here real soon:drink :fart if you plan on running the stock tranny i wouldn't run more then 100hp to 150hp unless you plan on buying a new tranny.......almost forgot,the allison tranny is an amazing tranny and will put a real fight up before it quits,but putting an addictional 350hp is just to much for any stock tranny...best of luck to you and your new toysi love the ppe but if you plan on saveing the stock tranny don't get the real big ppe if you do you won't resist the temptation:rofJust remember lots of power and smoke = transmission slipping. Its not just as simple as plug in the biggest, baddest chip and race. You ask Tyreboyz. He is up for some more upgrades here soon.
That said, your options include
I would go with either the PPE if you can afford it, or the Diablosport. The diablo is very reasonably priced and makes good power.