Virgil -

I've a 23' rear bath Norris upfit, not a lot different from yours. I put the floated backing plate conversion (torque arm or somesuch) and I ain't going back. The dam' thing will STOP, whereas before it would slow down and eventually quit, or it would flat spot tires and sort of stop. Someone was concerned about liability issues, my approach is, I'd rather stop the thing before it hits and there's no liability concern at all.
Now you may say, "I drive carefully and always leave stopping room," and this is probably true - certainly it is for me. However, I topped a rise at 40 in a 50 zone East of Lake Louisa State Park in Florida, only to find a copcar across the travel lanes so no one would drive down to where the life flight helicopter was landing to remove the combatants of a messy wreck across the fourlane. I got it stopped - with stock brakes - without having to tuck it in the median or the ditch, or t-boning the cop. I took a quarter inch patch off both back tires doing it, and shook my teeth out all the way home as a result. And then bought and installed the brake upgrade. I suggest you seriously consider it.

--johnny