My brother runs two Eddy AFB carbs on his 400/511 eng in his NSS 64 Fury and he also uses the Mod Man intake. He went to it also for hood clearance issue's as he was using an old tunnel-ram but had to run the taller modern 64 Hemi type scoop even with the lowblock. He wanted to go back to the stock height scoop so thats one reason he went with the Mod-Man intake. His 64 weighs about 3600 lbs with him in it and has run a best of 9.96 using this setup but it normaly runs 10.0's to 10.20's. I dont remember all the jet and spring specs he uses but he had a little stumble issue he had to work with but he has them working very good now as he is very happy using them. His line of thought on the Eddy cars is as he says to me.........I like to run the dual Eddy carbs but on a single carb for racing he prefers a Holley. They are working very well for him right now and I can always get more info on his carb specs as I knew them but dont remember them off the top of my head. Ron