I think steering shafts are a bit of a funny story with a lot of internet dogma attached...
I'm a firm believer in getting out the zip-cut disks and welder, for the record...lol.
You may remember that I installed an '87-'91 steering shaft in my '84 F150, and to remove the slop from it, I welded two nuts on the shaft so that I could tighten it up with set-screws, and it worked like a charm! I love it.
I read one account where the guy just leaned under the hood with his mig welder, and welding the slip joint solid to remove the slop. But what about the safety you might ask???>...It was an old F250 Plow truck with a cab that was already collapsing on the frame, so...
Anyway, I've read about a lot of guys installing that Borgeson shafts (the double jointed ones, with NO rag joint) and many of them reported not even noticing that the rag joint wasn't there...
1994 F150 4x2 Flareside. 5.0 w/MAF, 4R70W, stock.
1984 F150 4X2 Flareside. Mild 302 w/ 5spd. Sold.
1980 F150 4X4 Flareside. 300i6 w/ 5spd. Sold in 2021.
1980 F100 4X2 Flareside. 351w/2bbl w/NP435. Sold in 1995