I scoped a TC back in the 70s, back then TC sold a long eye relief pistol scope and mount that fit the existing holes, I found it really awkward to use.
The rear sight holes are too far forward for a conventional scope mount, that is why you see so many TCs drilled for Weaver type mount.
Every time I see a TC barrel drilled for a scope mount I pass on it, no telling who drilled them or how deep they go, they could go almost into the bore.
I just did a restore on a TC, I have 74 year old eyes and the rear sight is a blur for me, I have put a peep on the flint long rifle I made, using it I can shoot like a teenager again. I am considering a Williams Adjustable peep for my TC overhaul, because of the hole spacing I will have to drill and tap another hole in the tang to mount this sight.
I made this for my longrifle, but will go with a factory sight for my TC. I did put fiber optics on my other TC Hawkens, they work well but are still a little blurry for me.