Quite probably from the 80's. Remove the rear brake fixing bolt from the brake bridge, note that an axle washer was used it appears to take up some space, my bet is that the frame was made for recessed brake mounting nuts, if so a modification is quite possible, more threads on the brake bolt, an allen key nut, cut off the excess.prior to assembly, would look much cleaner.

Frame looks like toward the touring end of geometry, set the saddle, evaluate the stem length, change as necessary, fix the hanger and enjoy a nice bike, much better for you to use this than send to the scrap man... Frame was most likely 531, double butted, Woodrup was one one goes to for a bespoke frame, so why scrimp on materials?