billybob,vettedude73
I bought used glass tops from a 79 and installed them on my 75 about 10 years ago. If you get all the hardware, it's not hard to convert them.
At last years Vette show, here in Houston, I drank enough Jack Daniels to buy an Astro Top at a reduced price of $260 with vinyl cover.
Corvette Craig is man enough to admit that these one piece tops aren't the best. I agree. They do give you head room, more visibility, are lighter blah, blah, blah, but they don't seal that good. I had to take a piece of 2" black gaffers tape (cloth duct tape) and secure it between the windshield and top to stop air noise and rain from coming in. It did work and looked totally accepatble, but I don't think I need to go to that extent everytime I take it off. At any rate, it is back in the shipping box with cover and all, stored in my attic, with the rest of my Corvette inventory. I ran it for about 2 weeks.
I still like my glass tops, although I did have to put in sun screens I bought from Mid America. They really help to block the sun on 100+ summer days.