Hi there! Since it has come up recently, how many have tried modifying their TBI's fuel pressure regulator to be vacuum-referenced instead of a fixed pressure? What (if anything) did it do for you? Jay Vessels 1982 Chevrolet S-10 Sport, 2.8V6 TBI 1984 Chevrolet S-10 Blazer Sport, 2.8V6 carb. (for now)