Is your rifle similar to the Dixie Pennsylvania Rifle (stock number PF1070), made by Pedersoli and sold by Dixie Gun Works? If it is, I may be able to give you a bit of advice to consider prior to your deciding to convert that rifle to a flinter.
I have the flint version of the above-mentioned rifle. While it is an accurate shooter, the locks made by Pedersoli were definitely not made to the standards of our American lockmakers such as Jim Chambers, L&R, etcetera. In addition, the size of the Pedersoli lock is, shall we say, unique. I have thus far been unable to find even a close-size replacement for mine. Why do I want to replace it? Well, for starters, the thing has a real hearty appetite for flints. Absolutely loves 'em. It will eat a flint in 10 shots or less. My best record is 22 (that was one time only) on a single flint. Reknapping the edge is usually good for only 3 or 4 more shots. I've sent the lock to a noted authority to see if the geometry could be improved. He told me that there was nothing he could do with it, and that Pedersoli makes the locks to sell, not necessarily to last for the long haul. In addition, the Pedersoli flint locks are MUCH more expensive than domestic American-made flint locks. I wish some American company made a lock I could fit to my rifle. I'd buy it in a flash - no pun intended.
Please don't take this as trashing the manufacturer. This is not my intention. They just don't put as good a quality FLINTlock on their rifles as they could. My rifle DOES have fast ignition, and is very accurate with 65 grains of GOEX 3fg, a .440 cast ball, .015 pillow-ticking patch and water-based lube. I've rarely had it fail to fire if the flint strikes enough sparks to ignite the pan powder. The rifle looks good, feels good, and handles well.
The long and short of the above bloviation is that you may wish to consider selling your rifle and than buying a good-quality flinter. Whatever you decide to do, I wish you the best of luck and MANY years of enjoyment.