Just bought a 1966 Bonneville and none of the seat belts are functional. Some of the buckles are damanged and others are aged and won't adjust (the buckle won't slide on the belt). Any suggestions on source for original equipment replacement parts? Has anyone tried to remove the anchor bolts for the belts. I am afraid to force these. Any suggestions on how best to remove the anchor bolts without damaging the floor?

I bought some very nice belts from JC Whitney.. They are not exactly like the originals but they are chrome and look like they are from the 60s...

If you look under the car you should see the studs of the bolts sticking through. Spray them down with Liquid Wrench or something similar and let it soak for a few days. They will come right out. That pad that they are bolted to in the floor is strong. They should come right out with a 1/2" socket and breaker bar...

Classic Industries has seat belts for Impalas and Caprices so they would probably work for you. If you want something really close to original.

Ames Performance in NJ. Ames Performance Engineering, Classic GTO Parts, Firebird Parts, and Full Size Pontiac restoration parts. They have every part you will ever need to get your Bonne in shape!

Don't buy the morrors and power window buttons from Ames, they're pittiful..... I have much better luck getting quality American made NOS parts on E-bay..