well for the stock motor I would at the most run 28's just run the stock carbs with T.O.R.S removed and jet them I have a set out in the shop that are suppostobe jetted for sea level with tors removed that are up for sale they have the ide screws and cable make an offer if you want it? and for my-dixie what kind of port job is on the cylinders what pipes are you running it will help out a bit