Quote Originally Posted by gran racing View Post
There are things people can do to help ensure it's legal though. For example, purchase and provide the engine builder the pistons and cam to be used. Put it in writing that the engine has to be legal even if it's simply in an e-mail to them. Be upfront by telling them the engine will be torn apart at some point in time to ensure legality.

You might not ever be able to be 100% sure, but you can take huge strides in that direction.
Make sure that your engine builder understands what the limitations of the class are. He may be an expert on Prod or GT engines and not IT prep.