[niles]

Jake;
The first and wrong thing to do is start messing with the carb; especially when you said it was running great before the hardware change.
Ref; foursecsflat.com.???spelling ("don't touch the carb before getting the ignition RIGHT!!!)
You have been silent on that.
I would suggest you put the carb back exactly like you had it when it was running good and get the ignition right.
You need inital around 14-18 deg. total about 35 and all it before 2500 rpm.
Go to the tech section and plug reading and get you ignition right; only then start messing with carb. If your ignition is'nt right for your eng/hardware you will chase your tail for years. After 2 yrs of "bad carbs" 3 different one etc, almost all my problems disappeared after boosting the intial up to 18 deg. The whole motor changed personality and the carb would adjust like the books said.
Been there and screwed it up
gn