Diopter sights are easy to add/adapt to the rifle and offer an excellent sighting system that offers adjustability for POA/MPI, however they are after all, still iron sights offering no magnification. However, no further modification will be needed, and you can use the strippers to resupply the magazine as well.
Any scope and scope mount you add will need to account for a riser for proper cheek weld, operation of the bolt, ejection of brass, proper eye relief and extra mags for reloading (possibly). IMHO, it can be made to work, but it's awkward.
I've adapted one of mine with scope and cheek riser, but I prefer the rifle with irons as it was intended.