I've never done a 54/55 w/ mouldings. I think the oldest one was 56 or later. When I said chrome, I was using the old glass shop language ( OH CRAP, this one's got chromes!!!". I've done a 54 3100 with a Precision gasket, a 54 COE with a gasket the customer got from Jim Carter. The glass can play a big part also. For the COE I used Pilkington (formerly LOF). Came out great. The 3100 was a replacement w/s I removed and reinstalled, can't remember brand. I had to play with the gasket to get the corners right. A former coworker had 54 3100 w/a PPG glass and Precision Gasket that didn't fit right. I'm sure the glass was bent wrong, but unfortunately he totaled the truck and was killed before I was able to help him fix it.