This is a 572″ CID BBC twin turbo Nordic. It has Accel DFI EFI system and twin GT47s on it. The boat is a proven setup and has run the lakes around the Seattle area. These are the correct sized turbos for what the engine needs. Not the e-bay crap or old outdated banks or water cooled junk.
It has been done and I don't really see the problem in doing so. I know a guy that works for the owner of the boat and he says it hauls ass.
Link to the u-tube video