stock49-
Thanks very much for posting the pictures of the trunk lid hinge from the Fisher Body manual AND that great website
http://www.chevy.tocmp.com/ Old Online Chevy Manuals. I will set up a link from our website since it covers LOTS of Chevy years and model.
After removing the hinge/spring assembly, I found that the hinge pin was worn egg-shape so had to grind out the shoulder rivet and install a suitable shoulder bolt with locking nut.
My original problem was a broken pin at the inside location but it was still holding the spring by half the pin. I do not see any way to not compress the spring for installation. The spring is 16" long and must compress to 12". To do this, I built a 2x4/2x6 wood form to cradle the spring. I will use thread stock to compress the spring while safety wires are in place to hold the compressed spring. At this point, the hinge bar can be inserted in the spring and the installation can proceed per the Fisher Manual. What a learning process! Thanks for the great tips and links.
apache59