Sounds like you have a real gem. I have a 185 series SS model and am pretty sure it and yours have a 1:10 twist. I have been able to shoot hand loads with heavy bullets up to 70 gr. with fine accuracy. I had to reduce the loads to get good accuracy and reduce barrel harmonics, but now with the advent of the barrel strut, it should not be a problem to shoot full power loads. The only thing is that the strut might mar the gas block with the set screw(I have a SOCOM Accu-stru), and that may be something you might want to avoid.
I would recommend replacing(but don't discard) the original rear peep sight assembly with the Tech Sights RR200. That is, if you want to use iron sights. For just a purely scope mounted system I would recommend S&K or a good quick-detach(like B-Square) scope mount that attaches where the bolt stop cover is located. My mount allows me to use both iron sights and scope.
If you want a good front sight replacement for the original blade, there is the Choate models(I have the M14 style), but will require the installation of a lower roll pin, and again, you may decide against this. Other model flash hider/sights utilize the original roll pin for securing on the barrel.
Still, there are plenty of choices out there; much more than twenty years ago.