my first thought also.
The only good rule is no rule. As long as I can remember midgets have been expensive to run, not likely to change anytime soon.
Not to ruffle midget owners or lovers feathers but to me the cost of running one seems crazy when you can have a full size race car and spend less.
As for sealing up engines and such after your dyno run that's crap. What happens if I need to make pill or jet changes to keep my engine from burning up ?
You either need a completely sealed engines (crate) or completely open engine rule.