could get expensive, but anything can be bolted to anything, if there's enough money!
an easier way out, if you live near a salvage yard that has military/ civilian aircraft towing equipment, are aircraft and factory tugs. they were made even up into the '70s, i've been told.
many of them had torgueflight transmissions with the proper adapters to bolt up to your flathead 230. a friend bought an engine/tranny from a tug cheap, for his '37 plymouth pickup. however, these are not od transmissions.