Jack fitted my top, along with the longer bows, and it fits like an absolute glove, but it is a big-time *itch to put up. The instructions from the original 427 manual give the best steps for putting up a top, but mine is so tight, that it is a
real chore to get it up. I finally stumbled on a shortcut that makes doing it much, much easier. I put the top on the car
without the aluminum bows in the car, then I put one bow in the slot, then insert the second bow in to the first and slip it in to it's slot while I push the bows up in to place. If the top is cold, this is about the only way I can get it completely installed. After I found this method, the top now looks as good as any "modern" top. I've never read this tip anywhere, so I thought I'd pass it on to you -- maybe it will help you on the installation.