The 240Z sure looks promising! The ebay examples (exhaust manifold and intake/exhaust gasket) are certainly in line with the Algon manifold port pairing. One interesting thing about the Algon folks is that they often built injection systems for engines other than the traditional V8s. And in some cases these "off brand" manifolds were either one-off or cast in very limited numbers.
In any event, I'm guessing the 240Z is probably right on the money. Great call!
