Just confirming what we pretty much go by, 90 model Dana 70/71 with 3.07s and nuts holding the axles in place is 35 spline. The 91.5 dana 70 with 3.54s and bolts holding the axles came in at 32 on the spline count. The 91.5 is apart for a disc brake swap and the 90 is getting some kind of locker, probably going to try a powertrax lock right. I had all these axles laying around so thought I would do a spline count. What fun.