Did Chrysler factory set them cold like this back in 1960? f they did, they'd have to set them back warm anyways, which was actually usually done by mechanics at the dealerships as I recall.
Not sure what the factory did. It was understood that it was done hot during a major tune up. Back in the day. Most were never readjusted. .010 intake and .020 exhaust. +.002 each for cold. Sorry, was thinking 273.