If I remember correctly, My 06rcsb which I bought new went 10.90's around 121 mph with the stock tank/stock pump and 60 lb injectors, I't also had a meth inj kit on it as well wich might have helped a little bit. Data log in HPTuners said dudy cylce was near 130% so it was way maxed out. However, it worked, never broke anything related to fuel system.

Return style is the ay to go. Even if you have to put aside other mods to convert over, it would be work it over time.

 

Correction, The truck still was returnless on 100% stock fuel system except for an in-tank 255 pump.

 

For anyone reading this thread in the future. I ended up using a 340lph pump in the stock bucket, drilled the Venturi larger (can’t remember drill size), dropped a set of 1000cc injectors in and it’s been working great. So far I’ve only been around 10-12psi on 93, but fueling has not been an issue whatsoever. My fuel pressure is SLIGHTLY high at idle according to my gauge, but it hasn’t been an issue. By slightly, I mean it’s usually 62-64psi instead of the stock 56-60psi.