Cab on frame while towing?

[chevy_fatman]

I recently bought a dismantled shortbed truck that I need to tow some 700 miles, everything is apart, my question is What size of bolts can I use to secure the cab back on the frame so I can tow it safetly?

I'll be towing a 18 ft car hauler with my long bed and I'll need some of the space on the hauler to place the bedsides, my bed will be stuffed with the all the suspension components and maybe the doors, otherwise I'd place the cab in the bed.

The guy I got it from can't find all the bolts and nuts, and I don't think that some straps will secure the cab on the frame good enough to avoid damage to the lower parts of the cab, any replies will be appreciated, Thank you.