You are right, if it passes up the test they should keep away from the hood. Here in Houston they only check the pipe, brakes, lights, and things like that. I have no aftermarket parts in my vehicle, but would be upset if they started to check where it doesn't concern them. If you put in the 1988 Metro pistons you could use the stock carburator and still have a lot of power.

1985 Toyota 4x4 4Runner. 1989 Suzuki Sidekick 4x4.