what do you mean by different spline angle? can you show a pic or a link that shows that? and what is the cutoff year for those? i have a 67 727 that was missing a yoke and i pulled one out of a 84 dodge van that slipped right in.
I don't have a picture but what he's referring too is the angle the splines are cut at. It's hardly even visible to the naked eye but it is different. I'm not positive but I think it started with the advent of the A518 overdrive trans. which was 1990 I believe.