Uh-oh, I might have to take Fastfrankie's side of the argument. I split two more today (maybe more, I only glanced at the passenger side). 40 psi and highway speeds - no problem and I'd run'em all day long. 12 psi and lots of sidewall flex and these are #2 and 3 that I've killed.
I'll post some pics tomorrow but I must say, be very picky when you buy these older surplus tires if you plan to use them.
On a side note, I also had an accessory drive belt issue today that forced me to drive home with no alternator and occasionally no power steering from up some nasty canyon at this old silver mine (we even found a stick of dynamite in one of the drill holes!). Spose it's time to carry some spares cuz they don't like revving up to a 4 wheel burnout in low-low.
Chris