I think that the original frame is pretty well built and if the X frame was modified and strengthened and a few more cross members were put in That it would work for the hp and torque that the V10 has.
I believe that the V10 from the srt10 is the same engine from the viper so it is lighter than the V10 that was offered in the trucks.
I still think that a mustang II frontend with HD brakes and PS would be a good setup and some new leaf springs and a 8 3/4 would work pretty good too.
or a 4 link rear with coilovers or air ride.
think about it they are running 1 ton dually trucks with that setup
I'd do it if it was mine Ron...