My C4 has 108,000 miles on it, and is no where near pristine. But I'll keep driving it a while longer, or at least I hope to keep driving it... Last year at this time my favorite pickup was totaled and I'm now treating it as a parts truck.
I'm putting a Cadillac 500 in a '54 1-ton and after a test fit expect to be cutting the firewall and floorboards too.