The generic bushings are exactly like the original GM ones, which is a good thing since GM has discontinued them.  I don't have any experience with the pins.  We get $18.75 for a kit for one door (less you forum 10% discount).

I use a cherry picker or rope from the ceiling to support the door, so you don't have to worry about it slipping off the jack or tipping over.

Larry

I just bought some pins from autozone. They appear to be a little longer then the originals

any suggestions?

The replacement pins are longer.  So, put the top pin in from the bottom.  Also, the door springs have opened as many times as the doors and are most likely worn out.  They are much easier to replace with the pins out.  You will have to slide the doors back an inch or so to put in the new brass bushings so this is a great time to replace the springs.  Spring replacement is not fun and even less without the extra room created as you slide the door to the rear.  You will need the spring replacement tool.  RIK's has the springs and the tools.  Spring replacement can be accomplished with the door in place but very close to impossible and very difficult withour chipping paint so mask off the edges first.  Ask me how I know!

[QUOTE=OH6A]The replacement pins are longer.  So, put the top pin in from the bottom.  Also, the door springs have opened as many times as the doors and are most likely worn out.  They are much easier to replace with the pins out.  You will have to slide the doors back an inch or so to put in the new brass bushings so this is a great time to replace the springs.  Spring replacement is not fun and even less without the extra room created as you slide the door to the rear.  You will need the spring replacement tool.  RIK's has the springs and the tools.  Spring replacement can be accomplished with the door in place but very close to impossible and very difficult withour chipping paint so mask off the edges first.  Ask me how I know![/QUOTE]

if you put in the top pin from the bottom it will not slide out?

They will not slide out; They should have little spring clips/stops which prevent them from coming out.  Don't worry.  The other solution is to take the hinge loose from under the dash and put the pin from the top.  Trust me, that is to hard.