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From the pusher perspective, it impedes air flow.
Anything in front of the radiator will impede the flow of air through that radiator to some extent - including the condenser for the A/C. Yet, I know of at least one model of vehicle manufactured in later years that, when ordered with A/C, was also equipped by the factory with a front-mounted, electric-powered, auxiliary cooling (pusher) fan. That was in addition to the stock engine-driven fan, AND an optional, H-D radiator with an additional row of tubes. IIRC, that pusher fan only came on when the compressor clutch was energized. BTW, the Packard parts book shows a different radiator for all V8s with A/C, but I have no info on the details of its construction.
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Radiator cap is for three pounds...
A 3# radiator cap is incorrect; parts book shows that 12# was factory install on all V8s. However, a higher pressure cap won't make the engine run cooler, but only raises the point at which the coolant will boil (overheat).
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My car does not have the solex glass.
The lack of tinted glass could be a problem. Clear glass is used in a greenhouse to retain light and build more heat for plants in cold climates; same thing happens to the interior of your car. The additional heat that you feel means the A/C compressor has to run longer, and the engine works harder under that additional load. Although A/C and tinted glass could be ordered independently on these Packard, I can't recall ever seeing any other car shipped from the factory with A/C that wasn't also fitted with (optional) tinted glass.
One of my 56 Patricians came from the factory with clear glass (no A/C), and I'm tempted to replacing all with tinted. NOS side glass was still available 25 years ago, but there are glass vendors, today, who can cut new laminated flat glass, if needed. I've also heard that some can even apply the correct etched OE manufacturer's markings. Used tinted backlights (rear windows) aren't terribly hard to come by, but prone to damage in shipping because they are made of tempered glass (and the only such piece in these cars). Tinted windshield is the tough one and came with filter (the shaded band across the top) - blue or green filter in 55 (only) - or without. Not sure of the rhyme or reason for that.
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