how i usually do it when they're being a biach is one of 2 ways
1. put the bar pin on the ground, put the shock on top (so the bar pin is pointing up, and the shock is on top) wack the shock eye with a hammer till it gets started, then use the shock to just wack it in against the ground.
2. bench vice. just use it to get it started, then just take the shock body in hand, wack the partially started Bar pin on the cement floor of the ground till it goes though.
it's just how i do it...
31 jeeps in... still have issues