on the lookout for a front diff

[fijijason]

I just picked up this beautiful K10 and just about everything is in great shape except the closed knuckles on the front axle. From pricing perspective a rebuild is about 1200 so of course I figure I can find a newer open knuckle front axle with disc brakes. If anyone in Washington has a line on one with 4.10 gear (not actually sure if the gear is 4.10 but the engine screams at 65 so im guessing) please let me know. Im watching cl like a hawk now as well. any pointers on what to look for when picking up a used one? Thanks!