As mentioned, it depends on the amount of damage you currently have. I had a factory glassed Old Town of a similar vintage in my shop a few years ago. The glass was seriously delaminated and I removed it totally. I used a heat gun, gloves, a stiff putty knife, and pliers to remove it then the heat gun and scraper to remove any residual resin. There were repairs required, as the decks and stems were rotted and there was some bad planking. These repairs could not have been done unless the glass was removed. I’m not a fan of glassed canoes, but the customer insisted and thankfully I have a buddy that builds stripper canoes and does excellent glass work. It turned out great.
There is also a good chance that when the glass is removed, you will incur splintering and damage to the planks. Being transparent, those issues may be seen.
Just know that once you glass a canoe, any repairs needed are superficial only. For example, you can’t replace a broken rib but you can screw or glue new wood over the break. Effective, but looks like something the cat forgot to bury.