Like 8tray said, do a search on this forum. Lots of info from people who have done it. I have considered it, but decided to keep mine a vinyl top. Quarter windows, rear window trim, and some "pins" or something like that which hold the trim piece going across the top are what seem to be the trouble items. Oh, and the rust. Like stated, you can use your current windows if the gap doesn't bother you. You will need rear window trim from a hardtop version of YOUR car. Cutlass won't fit a Monte, not that I've seen anyway. Around here there's only one salvage yard with gbodies and he know$ it. My top is in great shape, but there is rust under the quarter windows :? When I'm done with school, hopefully next year, I plan on addressing the rust and getting new paint. I'm going to remove the top myself, scrape of all the adhesive and address additional any rust. Then I'm going to POR-15 everything that will be covered by the vinyl before getting it painted and a new top.