This is getting away from the topic of springs and frames, but is something I have wondered about. There seems to be much emphasis on converting to disc brakes, and it would help to know why. My simple minded thought is that, until the day of pulsing brakes under electronic control, a tire locked by a drum brake stops the same as a tire locked by a disc brake. I expect that proportioning valves on newer systems help prevent the problem of locking rear truck wheels (because of less weight unless loaded) while front wheels are still turning, but this is not a drum vs. disc issue. I really have no idea about differences in brake fading because of heat buildup, but this is not an issue for most "daily driving." Also, even I understand the benefit of having separate front and rear brake lines (and have done this on my 64 GMC pickup), but this is still not a drum vs. disc brake issue. So what is the great advantage that one gets for the time, effort, and cost of switching to disc brakes?
JRMunn
