Thanks to everyone for your support and good wishes.
If my "event" helps someone else avoid a repeat of the wreck I'm grateful. I've been towing all kinds of loads for the last 40 years and this was the first time I've ever had a rig go absolutely out of control with no recovery possible. Once the trailer started whipping the gyrations accelerated to the point where the rear end of the old F250 was whipping from side to side across 3 lanes of traffic with the trailer pushing it and the rear end off the ground at times. First time I ever tried to steer an 8000 lb wheelbarrow at 50+ mph and I hope the LAST !!!!
Enough normal life has returned now to "monday morning Q'back" the wreck and "if" I had "just a little more trailer brake" or "the rear brakes on F250" had been adjusted up tight I "may" have been able to dump enough speed early enough to stop the gyration set up by the swerve.... "maybe"...... or "maybe not"..... I recall the moment just before I did the Dale Earnheart into the retaining wall that I desperately wished for a big hand to come out of the clouds and grab the trailer to stop it from driving the truck. More trailer brake just might have saved the day. I leave that thought to everyone else here to ponder hopefully before an event like mine.
For those of you who would like to put some of the parts to use perhaps, the truck is an 85 F250, Two Wheel drive, 6.9 non turbo, new IP, new injectors, new glo plugs, new glo plug controller, new belts and hoses, engine has no bad habits, 4 speed, new clutch, new master, new slave, new fuel tank switch/valve, Alcoa wheels [no visible damage to the rims, would do a good inspection on them before putting them back in service], Dana LS rear end, 4.10's, new brakes from the backing plate out [ie. new springs, adjusters, shoes, drums, wheel cylinders, etc.] new shocks, f350 springs and overloads. Two clean fuel tanks rust free AZ truck. Loads of other parts that are not bent but can't find a single piece of sheet metal on the truck that is straight now although the doors still open and close normally and glass is good.
Would make a great donor truck if you had a good body/frame with no motor and other missing hard parts.
FWIW, Grant...