Carb swap, and all the adjustments with it.

I lowered the fuel level and it got rid of the sloshing. If I take out the distributer and the oil drive gear and move it a few teeth wont that take the aim off of the #1 cylinder when at TDC and screw up all the timming or will only one or 2 teeth still be ok, at the maximum how may teeth would be with in the "safe" range?