Pull the hinges and soak them in a pan of tranny fluid. If you have access to one, put them in a Ultrasonic cleaner. When you are able to pivot the hinge, it can be taken apart, by driving the hinge pin out, inserting the bushings & driving the new pins.

Good luck with the project.

Tony Smith
4-5-6 Chevy Trucks
501 Scott Avenue
Kansas City, KS 66105
913-207-7789
[email protected]
Photos: http://www.flickr.com/photos/4-5-6chevytrucks/sets/
Custom Parts: http://www.flickr.com/photos/4-5-6chevytrucks/sets/72157627022818563/
www.4-5-6chevytrucks.com