Go with the stock iron mainfold and a stock orignal Qjet! IMO and a lot of what I have read and been told this makes power and it is as good or better if you have a good tune on the Qjet. I have mastered my Qjet and it runs like a beast when floored. A lot of folks, even my brother (long time engine builder) talk smack about Qjets, but once I got my Qjet tuned in I would not go to another carb!!!
