One of those unwritten rules that I have kind of "always known" is that when building a driveshaft, have full weight on vehicle suspension, slide front yoke into tailstock untill 1'' between rear of tailstock and shoulder on yoke, and make that the basis for driveshaft measuring. I did that on my current roadster pickup project, (even made driveshaft 1/8" less than I measured). Tonight when I went to reassemble things, the yoke didn't want to slide in past that 1". It's a good thing that I actually went 1/8" less, or I wouldn't have got the driveshaft to go in.-----Now I'm curious---did somebody change the rules while I wasn't looking, or is it possible that since its an old transmission, the splines have worn to a "set" because it went a zillion miles with that same universal at that particular amount of insertion.---On a new turbo 350 will that front yoke slide in untill the shoulder hits the tailstock, or am I smokin something?