I would not spend $10K to convert to a carb from a TBI/EFI motor... There would most definitely be other options = anywhere from eBay to boat wrecking yards (yes they do exist) to even going with a Holley Sniper type of system. I'm sure it could or already has been done.

Are you handy/mechanical? This is not rocket science. You could do the majority of the work yourself, perhaps with help.