--I am about ready to fire up LeRoar with the single 4 bbl carb replacing the 2x4's. This will be a test to compare the performance between the two combo's. Everything is the same except the carb's. The track will be open in about a week although the weather may not be conducive to running. I hope I can avoid any more broken parts and pieces!After I document this comparison I will begin to tear down the engine for the major changes on the way. New cam, rear gears, torque converter, heads and eventually EFI. Here's hoping I can get the mpg's I'm wanting now that I've had plenty rpm's :-)Rich