My first bike, new in '65, in red.
I put a set of high pipes on it like those in the first picture. They seemed to make more low end torque, but were actually slower, top end wise, than the stock pipes with the bolt in baffles removed.
Great bike, and a Triumph 500 killer in it's day.
Pictures, lots of pictures, of your rebuild.
Good luck with it.
Oh I used to be disgusted, but now I try to be amused-E.Costello
'01 Kawasaki W650, '05 Yamaha XT225