i finally got my axle up under my Z71 yesterday. with the 33s on it,my chin touches the hood and im 6ft 2in.so i cant imagine how big it will be with the 39.5 boggers.i knew that i was going to have a front driveshaft angle problem from the get go. but beleive it or not,,i took the IFS driveshaft,,took the retainer off the slip yolk,,and it fits perfectly. i dont have to run a cv now. i have a great driveshaft angle. i cant beleive it. now i just need to get my steering figured out and ill be going good.