PM sent. Were the shocks functioning, or were they bone dry?
Precooking the shock on a charcoal fire, or hot tanking would be my first procedure. Then,
Back off the clamping ring, then remove the cover by anchoring the shock to an immovable base, and try a lot of light tapping with a smallish brass hammer befor using a strap wrench to unscrew the cover without marring it. That gets you to the inner cover which is probably a 1-9/16". Use heat and a breaker bar, or a big impact wrench like for truck lugs to loosen the inner cover. Then you hopefully get to the internals.
Or call me and I will sell you rebuilts.
Bob.