OEM 130 tooth flywheels are fairly cheap at rockauto (think 88 Dakota V6).
A plate to bolt to the back of the engine and mount the starter should be easy to fab. I'm thinking "option accessory kit". Heck the plate could be there to mount the engine to the test stand (but it would be engine specific).
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
