Originally Posted by thunderwagen

I ran my 05 return less at 8# on an lq9 and only fuel issue I had was I was maxing out the 42# injectors. My truck with a walbro 255 was getting 68psi fuel pressure and 64 under full boost.

I have run just over 500 rwhp on the turbo with the same pump and 60# injectors. For your setup you will be fine with the return less and 42# injectors.