AC heater box to non ac heater box 68 barracuda

I suppose that would be the best route where space is an issue with the OEM heater case. My only concern stems from my experience with aftermarket a/c setups.
Their fan motors would get really noisey with age and wear. They dripped water in the floor too. I doubt a heater case would drip water but... Is it designed in such a way that if its heater core ruptured it couldn't spray hot water in the cabin or on the passenger ?
We just never know what surprises will be found down those aftermarket trails.
Good luck to all.