Any of you guys know what the wall thickness of "48 Ford drum brakes should be? I want to determine if mine have been cut (maybe too much?) or might be out of round. They are on the front of my 2200 lb. roadster and they're not terrible but have always seemed to require a lot of pedal pressure to stop the car. I know,they're not self energizing but on such a lightweight car I can't help but think that they could be better. Maybe I'm just too accustomed to the disk brakes on my other car. I've adjusted these old drum brakes as good as I can and, while adjusting, when I spin the wheels, the slight scraping sound is uneven. The G.M. master cylinder is good, and there are no leaks or air in the system. I replaced the shoes about 5000 miles ago. Thanks in advance for your help.