After comming back from the dyno with lower than expected numbers (261rwhp and 567 rwtp), I believe I have found the reason for the low numbers. I found a moderate leak at the fuel bowl and at the quick disconnect fittings.
I decided to just redo the entire setup and install a fuel lab regulator and the 41402 fuel lab pump with replumbing the entire truck. Now the truck also has a 5/8 pickup tube and 1/2 return in the tank. I took it out for a spin yesterday and it appears that the low end response is much better than before. Once the truck hits the next gear at wot it becomes a rocket.
(at least for weighing almost 8600lbs). I set the fuel pressure at around 63psi which it seemed to respond the best to. Before I was seeing 58psi.
When funds come around I might just drop a set of single shot stage 1 injectors in her and take her back to the dyno (Only live 10 miles away from one lol).
I will post some more pics of the install at a later date.