Those are real nice touring bikes, you are very fortunate to have both the front mudguard and rear bathtub. Whilst it is apart, you might want to do a couple of easy frame modifications to greatly improve high speed handling. This involves switching to the later longer swing arm pinion which is held at both ends... if you search you can find the mods I mean. The other is to weld a small gusset in the steering head to stop front forks shaking. Even without, these mods, the bike is a delight to ride at sub 85mph ( and to be honest it wont do much above this). I loved mine even before it got steroids

back in 1962 when it was new.