custom 4x4 mower trans question

Hello,I am currently planning and collecting parts to build a 4x4 toy for the kids to ride on when we have our weekend offroading trips.

I have an 18 hp craftsman 2cyl mower that was given to me. It has a 6sp trans/axle. It has 1,2 and 3. Gears for forward and reverse with high/low.and the lever to lock rear wheels...

Now my question is... can i use this as a tranfers case type setup?for my project? Im not asking if this will bolt up this way..it will not..i said custom.Im concerned about strength.it is belt driven but i will either shaft it with or without a centrifgul clutch.has the clutch/brake built in.

I am a jeep guy and have a 97 cherokee with all the. Factory suspension under it.plan is to use axles and springs and steering components.Speed is not a concern as it will be for the kids.can always govern the power output on engine.

Im thinkin the mower trans would be great with all the gearing selections.it will have 31 inch tires and jeep axles are 3:55 gears.

Any thoughts suggestions or opinions are gladly excepted..

If i dont do this,I will use the engine to build some other toy..this is a new idea and do not plan spending money on anything but steel for frame n cage.maybe a clutch.

Throw your thoughts out.id love to hear it.