I had the opposite problem on a 70 fury. The window snagged on the top. We loosened the rear fixing bolts on the frame (3 I think) and pushed the frame up.
Try the opposite. You can also try releasing some of the cable tension.
shipping
Think again Bud. I'm in New Zealand.Fear not, we have a postal service too.I'm over dealing
with banks. I'll just mail you the cash and you can keep the change.( My risk) My NZ zip code
is 7476,but doubt that it will matter much. Cheers Geoff Simpson