What do you mean by "burning rich"? Running rich or you think the car is rich because the exhaust is burning your eyes? It might help us to determine next steps if we had more details.
Other questions -
How does the car behave when driving, does it load up (act like its getting flooded) or does it surge at cruise?
If the exhaust is eye-burning, it might actually be too lean, so again plug color can be helpful. Have you checked plug color, and if so, what color are they?
If running rich have you actually rejetted the carb vs adjusting mixture screws?
Its very hard to give advice and really be accurate without being in front of the car,but maybe we can give some things to check out if you can fill in more of the blanks around symptoms you are experiencing.
Knowing you have an aftermarket cam, but arnt sure of the specs, I would also want to know initial advance on your ignition timing. Cam specs would be useful,but not critical.