First let me thank everyone who commented on my supercharger post a few weeks back. It is wonderful to have such a wealth of Y-block info so easily accessible.

I'm currently looking to buy a 1957 2-door custom 300, but i am wondering what the differences are between the 1957 custom and custom 300. I know the codes are 70a (custom) and 70b (custom 300). I also know that the original paint and trim were different. Were there other body or mechanical differences? I have been told the heaters were different and that the custom 300 had a clock. However, i can't find any info on such things.

Hoping you guys can help.

Steve