1945 vs bbs

a friend of mine had a 1969 van w / 225. holly carb. the idle circuit was so lean it kept dieing and pump the throttle and start it. the black smoke would roll out the pipe. so i took the carb apart and opened the idle jet up. cant remember how much. but it might have been .003" to .005". the jet is NOT easy to get to. the Carter is much easer to get to the idle jet. after it was together the engine would idle at 250 RPM. very smooth. course you dont leave at that RPM.