I reckon you just pulled half those numbers out your butt Pete. We need evidence.
I could just say 267cc Hodaka Army Squrrel and no one would be the wiser.
A fire engine with the number on the side doesn't count Al.
267
Chevrolet made a 267 Cubic Inch V8 for it's 1980s Camaros and El Caminos in an search for fuel economy.
Camaro History