Towing a manual A100 with a dolly?

I may need to tow a 1969 A100 about 200 miles. It's a manual (3 on tree), slant 6.

I am assuming that I will need to disconnect the drive shaft. Is that accurate? Will the transmission burn up if this isn't done?

One disconnected is there any trick to make it secure enough to not hit the road? Good way to tie it off?