Ok, don't laugh, I though I would NEVER ask these questions. I have stumbled across a CJ7 DANA 44 with 4.10 R&P that I just can't pass. What would be a reasonable $$ and simple locker for a CJ Model 30 axle and what is a fair price for good used 4.10 R&P? Will the carrier for the existing Model 30 2.73 R&P work with an upgraded 4.10 R&P? Thanks for not flaming.