12a turbo td20 or series V turbo?
 

I have a 12A turbo engine in my sa-22 all original 34000km rx-7, and I want to run a TD06-20G or RX-7 Series 5 turbo as they are water cooled and modern. I want to know if I want to keep the original EFI system and make it all look original. I wonder if there is an exhaust manifold that allows this? What else must I consider? Thanks for any help you can give. david@davidrobertson.info