Re the 6 bolts holding the drive shaft spindle to the rear end.
Are lock washers recommended. I know lock washers were not installed by Henry, but I want to be safe.
How tight should these bolts be
I believe these bolts had lock washers originally. (I am assuming you are talking about the later style with exposed bolts, not the early with studs & nuts...that kind used a lock wire.) How tight...rule of thumb I always heard was 15 ft.lbs for every 1/8" in diameter. I never torqued them, just got them gut-n-tite.