I have a 79 k5 and a maybe 70ish 3/4ton sub were taking the axels off of and tranny and tcase. What tcase is on it (it has 4 high, low, and 2 high, where as k5 only has all time 4wd) and tranny is it? While im swapping the axels should I swap those out too? Also what is needed to turn the rear breaks disk? Anything else I need for the swap?