Looks to be a US car. Black firewall, splatter trunk paint, "Chevrolet" stamped valve covers.
Sure is a beauty.
I am guessing the engine paint is touched up. It's too nice for 50 year old engine paint. Too bad in a way, it would be cool to see it totally untouched.
__________________
1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
Saw it in person at Trev Deely show in Van. Clean car mostly orig.Talk to the owner for a while,seems he has a few high end cars. Think he bought it at BJ.