Mid to low 11s afr. I am trying to teach myself to think in lambda though so .75 to .80 lambda low to high.
The fpr is an aeromotive, I have dual 6an lines going into the reg, single 6an back to the tank, I think you could go larger if needed. I have 8an on the supply side to the rail. I bought all the fuel system parts at Jegs. We have a local Jegs retail store, which is awesome.