I've had a rag joint fail at the box,and it was not a fun ride,when the steering heel spun around about 50 times and NO response at the wheels! 
..I was making a U-turn at about 15 mph when it failed..I dont like rubber rag joints!..as for rthe "HELP" section ones,they are pretty cheesy,a hunk of an old tire is probably stronger than what they made them from,ot looks like the rubber/fabric cord that V-belts are made from or conveyor belting...I found a decent used one at a junkyard ( steering shaft) but I had to go back a few times--I had the splined steering colum not the "D" shaped shaft--plus the flex coupling at the colum end was sloppy too,so I kept looking till I found a tight one and used that shaft..I was tempted to try a Jeep one ,I had read here that they were an easy swap,but I was up against another snowfall and didn;t want to waste time trying to modify one--..
I used a steering shaft from a 70's Dodge power wagon 4x4 we had at the junkyard to replace one in a 78 GMC and it was u-joints on both ends,and was a tad longer,we shortened it the same way you do on the Jeep ones--it surprised us that it bolted right on !...
..I was making a U-turn at about 15 mph when it failed..I dont like rubber rag joints!..as for rthe "HELP" section ones,they are pretty cheesy,a hunk of an old tire is probably stronger than what they made them from,ot looks like the rubber/fabric cord that V-belts are made from or conveyor belting...I found a decent used one at a junkyard ( steering shaft) but I had to go back a few times--I had the splined steering colum not the "D" shaped shaft--plus the flex coupling at the colum end was sloppy too,so I kept looking till I found a tight one and used that shaft..I was tempted to try a Jeep one ,I had read here that they were an easy swap,but I was up against another snowfall and didn;t want to waste time trying to modify one--..I used a steering shaft from a 70's Dodge power wagon 4x4 we had at the junkyard to replace one in a 78 GMC and it was u-joints on both ends,and was a tad longer,we shortened it the same way you do on the Jeep ones--it surprised us that it bolted right on !...
