if you need to spend $400 on a nismo fuel pump togo to E85, why not buy a decent FMIC, Greddy ones at only $600 with full piping kit, less how much you sell the current one for... then you know you have something decent... $1000 on a FMIC is overkill for your power level and parts being used, like your using a HG turbo your not exactly putting top shelf parts on, decent parts yes, but $1K on a FMIC for your setup aint needed...
fix the issue, then when you go further in the future you atleast have a solid base