Hey just to throw something in, I got a flowed 4.3 TBI with guage and regulator built onto it. The place is R.V. Morse Machine out in California. The nice man's name is Vic, Mr. Morse, and they can be found at rvmorsemachine.com or call him at his number on the web site. This guy has forgotten more about injectors than most so called experts will ever know. Flowed TBI(15% over stock 4.3 TBI), gauge and regulator were $50 to $60 cheaper than the Holley. With my motor this T.B.I. should be just the ticket.And on top of everything else you can brag about having a custom built T.B.I. JMHO.