Hey Lugnutz...
The bearings and hubs are different because the 1960 and 61 hubs used ball-bearings (which require much more maintenance) and the 62 and above use roller bearings. So, the 60 to 61 hubs have a bigger diameter hub for the ball bearings to fit and have different spindle nuts and washers along with a different cap than the 62 and above (with smaller diameter hubs, washer and cap).
My problem is the spindles. I have read they have different part numbers between the years, but I was hoping to hear from someone who can tell me from experience.
Sorry, I am not the guy who bought the fleetside fenders... I have 2 step-sides and 1 dump truck... no fleetsides....
Thanks, Russ