I'm checking around at trans options and I'm wanting to eventually have about 700hp right now I run around with the H&S 250 KEM tune, but I want to be able to run the 345 and not worry about breakage, I plan on fuel and turbo upgrades later in the year but I want a good foundation with the trans. I spoke to brian at BTS and he was telling me about some people that have swapped a 4R into their 6.4 pwoerstrokes and I spoke with rudy's diesel and they told me the 5R built will hold 700hp all day, not sure what to think or who to believe, curious to see what you guys have done.