Getting a 1959 H&R Topper 12ga 148A, has a 30"full choke barrel, would love to have it cut down and threaded for screw in chokes. Sight ramps soldered on for smoothbore slug shooting, but I also want to know if it shares any parts with the newer H&R/NEF guns ?

I'd like to swap out stocks either with Black synthetic or a none pistol grip straight stock. Anything fit this one ?

Thanks guys.