Cowl tag X55 or X66
From what I've read it would seem that a 69 camaro with a X55 cowl tag has a small block only and never a big block. I have a complete SS body, bought in late 70s that has a X55 tag but has a big block heater, heater core is dated one month before tag date, single fuel line, original big block frame mounts. Is it possible to have a X55 big block?
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