I wasn't sure where to post this, so I'm starting here. My 64's back glass is trash. It's pitted on the inside from the previous owner welding up the cage. And scratched really bad on the outside. (Almost looks like somebody tried to scrape the windows with there keys) Anyway I've found one source for the rear glass, but it's pretty pricey!! I was considering using lexan for the rear.(Half the price) What are my choices for attachment? Could I use buytl? Or would I need to screw the window in place. I guess I'm looking at alternatives....any ideas??

My buddy had a 67 drag car that had the back glass screwed in.

I originally had the lexan back window in my El Camino screwed in. Sure did put a lot of screw holes in the wondow frame, though. I am now reassembling after paint and body and I don't want to use screws again. I'm thinking of trying butyl as well. I might put in one cross brace that is screwed in, just to be 100% the window doesn't fly out at the top end of the 1/4 mile.

pardon the butt-in but what is butyl? i'm thinking of installing lexan also.thanks.

I would think urethane would work better, maybe you should do a test to see how well the urthane would stick to lexan, sure is a lot stronger than butyl.

Butyl tape is a roll of 3/8" dia tar rope that is used to hold the windows in these older cars. Sold at most parts stores.

Make sure the plastic window is not illegal in your jurisdiction.

thanks!

For a sealant that sticks to metal and Lexan I can recommend something I use in my sign shop, it's E-6100 mfd by Eclectic Productions
Inc. It's available in CA, WA and OR at Tap Plastics. BTW, Lexan (brand) has 10 year warranty against yellowing, other polycarbonates may be 5 years or less, so check that out before buying.