Danarchy: Most of the high end cars of the 20’s & 30’s had louvers thermostatically controlled to adjust air flow to radiator, rather than an in head thermostat used on more modern cars.

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

Sure. Perfect.

Sam

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The only reason I can see for rounding the corners is to reduce the potential for injury. From experience, I can also suggest putting a file to edges created by tin snips. The little buggers can be hard on hands.

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You can't fix stupid. - Ron White