Question/Interest Models of the "Poly-Head" engines?

Cool idea...you might have thought of this, but couple kits came with an LA 273, maybe a good bottom end to stat with, Little red wagon reissue? I think, any how I might start with that and fab some heads try and do the rest of the details off that instead of starting from scratch. www.allpar.com has some ok info, not always 100% accurate and usually 50% complete. But serves as a good jumping off point for finding some things such as which colors, trim packages and drivetrains where available.