On the booster your best solution is to get a booster for the 440 specific half tons which is the same as the regular 3/4 ton chassis, its smaller in diameter to help clear the valve cover. If you keep the bigger diameter pancake booster you generally have to make a pretty good dent in the valve cover for it to clear the booster and then taking the valve cover on and off can be a challenge and if you want to go to a taller valve cover it won't even be an option with the pancake booster.