What's amazing is that that particular ebay seller has been selling these cast aluminum flywheels (calling them racing-Briggs flywheels) for several years now and getting big bucks for them.
Yeah, that is what I thought when I had that flywheel was delivered. It sure did look like an aluminum cast. That had kind of made a bit furious that I got jipped out! oh well, we live and learn. But it's a good thing I didn't run it, hopefully others won't either.