You can truss the axle tubes, but as mentioned before the 35 is not worth the time or effort or money. But, trussing the axles will make your weak point the differential, so you would need to upgrade your gears if you were to do that. And the 30 I would just get upgraded shafts for.

Gun it and run it!
1981 CJ5,258,T-176,D300,AMC 20,Dana 30,Trxus M/T 31x10.50, Rancho 5000's, GroundPounderFab front bumper, polyethylene gas tank, aluminum dash, AutoMeter gauges

What this country needs is unemployed politicians.