beg your pardon, but my aunt still has a '62 Bentley S2 twin carb with some 500.000 m on it's first engine, one of the most reliable cars I know. If properly maintained those engines will live almost forever.
Geez....it's a Bentley...I would be more likely to expect that from a Bentley than I would a '62 Chevy/Ford/Chrysler, etc.
Don...those old slant 6's were tough engines. I put about 125K on one of them. A Dodge Dart...actually, it was my first wife's car, but we used it when first married. Baby Blue, no A/C, no PS...it did have an automatic tranny though. I can't remember exactly, but think it was a '74 or so.