Front Axle Problems Encountered

[moodyholler]

Took my 72 blazer up to alignment shop and they said it needed new balljoints, so I stopped by my local Advance store and bought all four. I have a factory manual so I thought they would be a cinch. I also said, ok, I'll go ahead and put new u-joints,bearings and seals in while it's apart. the only thing they sold me that fit were the balljoints,out and in in 2.5 hours,but I still don't have the rest put together.
My option list says HD front axle, what does that mean? I had to buy 1 1/16" u-joints(for a 71),and book calls for 1 3/16" u-joints. Also had a hard time getting axle bearings and seals(inner hub) and had to get them for a 71 also. Does my truck have a 71 front diff in it? LMC calls for two different u-joints in 72.
Another question I have concerns the front driveshaft. The slip joint is worn and has considerable slop in it. Where should I get a replacement for it?
By the way, old balljoints weren't bad, some yo-yo did not torque the upper adjusting sleeves and it made the uppers feel loose. Just my luck!!!!!!!
While I have your attention, My glove box has woodgrain on it and the emblem that was there said super cheyenne, is this correct for a 72 cst? What should it say?
And finally were there two different style seats in 72? One square with a metal back and one tapered with a plastic back?
Is there anyway of knowing what seat patterns mine came with from the fsacotry?(cloth, houndstooth, or vinyl scroll?)
Thanks for a great forum. moodyholler