So true. Just read any ad on E Bay for a car with a small block chevy engine, they're all Corvette engines. By the same token you will see every early OHV Ford thru 1957 has a 312 cu in engine, even the 1954 models. Corvette valve covers do not a Corvette engine make and the same goes for T-Bird valve covers. They even had 272 and 292 cu in engines that had valve covers, painted black, that said it was a Thunder Bird engine and fender emblems attesting to it as well. Like you said check the serial numbers and you have to pull a valve cover and look for the casting numbers under them to know for sure. The Corvette FI heads you mention, often called the "camel hump" heads were superseded by far better equipment by the early to mid 1960's anyway.