You are correct. Never metal on beaumonts or chevys. I have seen some higher end cars(buick, olds, caddy, etc.) with those metal ones. Also the top is a wider diameter indicating it is also for a fullsize car.
__________________
Beaumontguru
MY BEAUMONT HAS 4 STUDDED TIRES AND 2 BLOCKHEATERS......AND LOTS OF OIL UNDERNEATH. The other one has a longer roof.