Thanks for that information Cab, I am fully aware of the things involved because I drove and helped out on a "brand C" powered dragster that my brother in law owned. It had a carb done by a reputable carb company. I am just trying to decide which one of the many carb builders are likely to give me the most hassle free setup that will be suited to my combination, not just what they have on the shelf to sell me. I thought it was likely that there would be a fair number of people here that could offer real world experience here, but it looks like either I was wrong or they don't want to share. The gas carb I am using is one I purchased used from a local that had been set up by Thumper Carbs and it has been good but just trying to decide where to go from here.