No it is not about engine theory. Not that kind of an discussion. The wife found this engine reasonable at an estate sale. The people do not know what it is other than grandpa was a hot rodder and this was in his stash. I truly do not recognize the engine. It looks familiar but I cannot definitively put my finger on it. Mrs 'Beaner cannot either. This is a rare occasion. I think it is a 350 olds (which I am sure is absolutely wrong) she says its a Pontiac (of undetermined displacement) So lets see what you think (or know). Fun, fun, fun.