Ok here is my dilemma.. I have a FMU w/ a 12to1 disc in it and I have the oppurtunity to trade for a greddy blue box to control my Fuel ect.. I am only going to be running around 7-8 psi on my Rex w/d15b2/y8 head Should I trade or just run fmu and bigger fuel pump?? What would be better for my setup?? Thanks, Kyle