Rick,
I would bet with that old Glass that if you heated it in an oven it would completely delaminate ...the Glass is OLD ....and the plastic between the layers has seen its length of service.
You would be further ahead since your glass is intact and you have it out or gonna take it out it would be best to take em to your local Glass shop and have replacements cut using your glass as a template, being flat glass the cost should outweigh the hassle ??
Just my thoughts
Tim
