Your 3rd photo of the 49-53 was one of the ugliest front end designs ever. The trim below the headlights always looked like the thing was crying. Plus, the direction of all the chrome from the hood made it look even sadder. THE ugliest front end ever.
BTW, looks like a 1958 Impala behind the Olds. Distinct slopping back roof and window...could be wrong. Personally, I think the design of the ‘58 Impala was Chevy’s best design ever, even over the iconic ‘57. 1963-4 were also smooth cool looking lines.
Interestingly, every one says Mopar were the first muscle cars, when in truth Chevy produced the 409 in 1961 that beat anything on the road in a straight line.
A neighbor has a very rare ‘61 409 Super Sport coupe. Black with red interior.