My deal is that I WANT a front locker, although I may not absoultely need one all the time. I'd like an ARB. I have never seen a small block powered truck with an open diff up front break a 10 bolt or D44, but I don't doubt that it's possible. That's why I'm somewhat afraid to lock mine--I'm not going to spend $800+ on a front ARB and then start breaking axle shafts--screw that. I wouldn't really want to spend $800 to upgrade a 10 bolt or D44 either, especially when I can get spare shafts for free all day long. (I have one pair of spares right now, but if I should need more, they're easy to get a hold of).
I guess I should just live with the open front, posi rear for now. Maybe get a locker in back for a little better traction. But where I go, RPM = traction, so I'd assume that a front locker would tear up my 10 bolt quite easily. I do have a 14 bolt SF though, I doubt I'll break that in a 5,000 lb. truck. Especially when the truck it came from had first a Diesel, then a BBC.
Tim
'84 Chevy K10, lifted, loud, fast, and 3/4 ton axles