How to Identify front drums

[Techie79]

That is why my dad has always told me to measure twice and cut once because that 1/4 inch will get you every time. Based on the info that dwcsr posted it sounds like the outer bearing was used in quite a few models from the late 40s through late 50s. When i go to the parts house the won't have a clue, so does all of the 48-50 chevy cars use the same wheel assembly parts or just certain models?