The next SuperAuctions is practically around the corner

and I am looking to score either a really nice working classic

...or...several junkers to restore...
My question is: Has anybody transported 2, 3, or 4 cabs in the bed of a pickup truck safely and succesfully??? and if so, are there any tips or procedures that may be helpful???
See attached picture. This is from
http://www.carnine.net/arcade/Just wondering if anybody has tried it and how safe it would be.
I see from the picture that these cabs are all empty, so that may be doable...
I would think that since most cabs are somewhat top-heavy if they still got the monitors in them, they may not be all that stable in the bed of the pickup truck while gently making a turn, even if they are strapped to each other and to the side of the truck bed. Or maybe if they are all strapped together they would counter-balance each other on the turns?
How about 2 cabs standing upright in the center of the bed... would they be stable if strapped securely to the sides of the truck bed using those ratchet-type straps?
Any helpful tips would be apreciated.