As long as you don't try to use the jacks for lifting/leveling, if you can mount them securely, the idea should work for mild stabilizing.
Another option could be to mount a pair of swing-up, boat trailer style, tongue jacks, one at the end of each rear frame rail (remove bumper and build a heavier duty one to mount the jacks to). Same could be done up front, except mount them on extensions, to each side of a front receiver hitch.
Screw-type scissor jacks under the frame rails could be another option, like travel trailers use for stabilizing.
01 International 4800 4x4 CrewCab DT466E Allison MD3060
69Bronco 86Samurai 85ATC250R 89CR500
98Ranger 96Tacoma
20'
BigTex flatbed
8' truck camper, 14' Aristocrat TT
73 Kona 17' ski boat & Mercury 1150TB
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LockRite rear