OEM blaster carb is really about the most simple to tune and keep tuned on a non highly modded setup, that small of an overbore and only a fmf with no other mods should net you a very simple jetting setup, I'd get a stock carb, tors delete, add idle screw, start with stock 32.5 pilot, 290 main, needle in middle clip, set the float correctly and plug chop to confirm jetting, would also recommend getting jet sizes from 240-320 minimum to allow for changes and other mods in the future, hope this helps!, also , plenty of good info on stock carbs on here - searching helps