273 and 360 interchangeability?

I promised more info today. Unfortunately I have not been able to reach the seller so far :(

Onto another question, if the 360 was hooked up to a manual 4 speed before going out for sale, will it work with my 727? If not, what would I need to make it work? Converter needs to be balanced? I think I've seen flexplates that could solve that, right? Is there a difference between the crank on a manual 360 engine and a automatic? So many questions...