Got a few rear end questions

[seanrolandwood]

1.Will a series 4 posi carrier unit fit in my stock 12 bolt?
I know that posi units use 30 spline axles and thats where my next question comes up
2.I know yukon sells a 6 lug replacement 30 spline axles, rad, but is there a c clip eliminator kit for stock replacement axles? The only one I've found is produced by moser it says it fits the truck but it also say for use with oversized axles so im confused and the 1st to admit i dont know much about differentials and such so i dont want to end up with parts i cant use...so i guess ultimately im asking if i can use this c clip eliminator with the replacement axles