actually I just got off the phone with Dr Diff and he informed that they do indeed make two different length thrust spacers. 8 3/4 are different than Dana 60's, they are two different lengths. 8 3/4's are 3/4 in long and dana 60's are an inch. That makes up my 1/4 in end play problems. Once they get here I'll post the results. I think this should take care of it. I originally bought the year one 8 3/4 spacers that are 3/4in as you mentioned, not knowing there were two different lengths. I guess the dana's and 8 3/4's aren't as inner changable as allot of people (me included) seemed to think. Always learning it seems, Thanks for you help!