If it's just a chip - even with outward crack of up to six inches, have the windshield repaired not replaced. About $50 to $100 ... and stay away from Safelite, they'll tell you it needs to be replaced 99% of the time!
You'll pay a deductible to have new glass put in, but almost all insurances will pick up the whole cost of a repair. I had one done on the old Chevy - and it held up fine. Didn't even pop out when it wrecked.
Just do a google search or go antique and use the phone book under windshield repair. There are dozens of little shops that do this work.
Today is a gift, that's why they call it the present.