turbo 4 barrel

thats an awsum set up Bill .. i was thinking 300 or just under. 10 12 psi of boost..is a boost referace fuel regulator only for EFI or can it be used on a carb set up as well..do you mean 6.5 pounds above boost pressure ? ie 15 psi of boost should have 21.5 psi of fuel pressure. ? if i can get it figured i'l post some pic's .. thanks again