There must be some difference in the Vortec vs regular heads, because when I ordered my Sanderson Headers I forgot to mention Vortec. Then I called back a week later and told them, and the girl said "Oh, thanks for telling us, yes they are different, and I will put that note on your order." I don't know what that difference is though.

I just looked at the Speedway catalog for you, because they are selling new ramshorn type manifolds, and they only say "small block chevy" and make no mention of Vortec or not. You might call Speedway and get a tech guy on the line and ask.

As for the Rochester Q-Jet, they are very good carbs, and very much overlooked. Millions of marine engines have them on 350 Chevy engines, and they work great. I suspect the fuel economy is better too with those small primaries. I have always put a mark on my boat's throttle control at the spot where the secondaries start to come open, and stay below that spot, and have gotten good milage. I think hot rodders tend to thing Holley or Edelbrock, and have overlooked a very good street carb in the Q-Jet.

Don