Looking for a mild performance upgrade

[ttyR2]

I picked up a clean 2000 F-350 dually crewcab longbox 4WD 7.3L w/6speed stick truck last weekend and am thinking about doing a few mods. Reliability is very important as I'll be towing fairly long distances. The RV trailer we have is 8800lbs GVW.

I'm thinking about a 4" turbo-back exhaust system (Diamond Eye or MBRP) and a GPT38r turbo.

Would the FU or FU2 setup be most appropriate for a basic upgrade like this? Injectors may be in the future, but I'd rather see how the truck runs with just the exhaust and turbo at this point.