If you can find you a couple of well bred busher bred mountain cur pups out of the larger type mt cur lines...you will get the nose for trailing and winding...they can be taught fairly easy to wind off the wheeler or truck (rig), road them or cast them...
some might be too long range and can stay bayed for hours...just make sure you don't have to work the next day...
I don't really know much about mountain curs but from what I've read about them a lot of lines are very gritty, is there anything that really sets them apart from other cur types?