I swapped 11.75" discs on my 64 300, replacing the 11x3" drums. The drums would pull in different directions when they got really wet, other than fixing that nothing was a lot different. Didn't do enough stop and go traffic to get the brakes hot enough to fade and I drove that car with drums for over 5 years in San Diego, took it to Memphis and back that way as well. So I really got to wonder about the real cause of brake fade.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.