I've seen them in the past, but I've never actually owned one, so I can't speak about them from experience. They do look nice and unique primarily because of their unusual valve covers, but I can't tell you anything about them beyond that. The link that I provided should be of some help though. If I were you, I would just deal with it as you would any engine that's been sitting for years and go from there, but it's certainly something that I would keep if it is useable...