Keystone Wheels 1970 Chevy Caprice?

1970 Chevy Caprice? - keystone wheels

I have a 1970 Chevrolet Caprice, I know what it is. It has converted one 400ci engine and trans. There are over 7000 miles. near perfect interior, body is excellent, it's a bit rusty, but very little, and what is the rust is surface rust. The painting is not terrible, but could (use a paint and scrach new here and there) Im not sure whether the original engine, the numbers there. The age of 156.000 miles before the test. I have a picture on where the new form. Any help would apperciated. 50% tires and wheels from Keystone.