I believe the c-clip elim are for 12 bolt. I also think you can get a 33 spline detroit and 33 spline axles for the 12 bolt. Just looking into this. http://www.moserengineering.com/moser_interior/products.asp?CatID=2 I know some will say just go to 14 bolt - but getting the d-shaft shortened, converting to 8 lug front OR a d60 (shorten front shaft also), 5 new wheels, 5 new tires, disc brakes in rear, adjustable proportioning valve, extra dollars for the stuff that doesn't go as planned, wear and tear on my 40 yr old butt, pissing the wife off (priceless) etc. So the right way will wait for now. With the 12 bolt there is a 8 7/8 ring gear (which I think is close to a d60 (but may not be as strong)). Beef the axles and carrier, throw an axle truss on, and this will get me around for a while. How would this setup compare to a d60? BTW - this truck will never see rocks or fender trimming. It will see offroad though and I want to get back on road after. What do ya'll think?