I was never a believer in aluminum intakes or headers until my son's 85 Ford F-250 4 x 4 with a 300 6 developed carburator / computer problems. We didn't want to buy a new 1 bbl and deal with the computerized carburation crap, so we replaced it with a Clifford 4 bbl intake and headers that we found used, and a new Holley 4160 390 cfm carburator. Fuel mileage was about the same, but the truck ran much better with alot better acceleration and alot more power. In fact it would spin the tires in 3rd gear on pavement if you got on it. We're planning on doing the same thing to his 69 Ford 240 this winter. They sell stuff for Chevys too. I think everything they sell is for inline engines. They sell direct. www.cliffordperformance.net