Yea the seat stays on that frame are bolted on at the top...it's more like a rivet type thing at the drop outs though. You pull the seat clamp bolt out and you can pivot them fore and aft. Frame is not bent, steering tube is in sad shape though...might be able to pull it back without too much fuss but I'm a long way from worrying about that
Lately every time I look at that old CCM frame I have visions of a 1910'ish Indian that I have to fight off...I must finish the RIff Raff bike first!!