I don't know if I'm posting this in the correct location. If not, I apologize,tell me where to post and I will

I was doing a remodeling project for some people who had a 1966 300 convertable in the garage.It looked to be in pretty good shape,I was admiring it, the owners said they want to sell it. I told them I was interested.

I don't know anything about Chryslers. I figured I need to first find out what the VIN was.

Anyone know where to find the VIN numbers or VIN numbers? That would help me begin the figure out a price.

Thanks for your help

Newbie