Somewhere a very long way down the project list is an idea I have to get my water brake dynamometer mounted on a trailer, with enough support equipment to make it possible to pull into a swap meet or a car show and offer stovebolt owners a definite way to document their modifications. That one bolts to a bellhousing, so the engine would have to be out of the vehicle to run a dyno test. It's entirely possible that some of the hotrodders really don't want to know if their "improvements" are all that effective. I think they would be surprised to find that most of the extra power that most modifications make happens at RPM levels the average street-driven engine seldom, if ever sees, and that a well-tuned "stock" engine will almost always make more low end and midrange power than a modified one.
Jerry