Wouldn't there have been a vin change for 289 2bbl vs 302 2bbl?
In '69, when the 302 2v was standard you had the F code.
'68 was still using C code (which was a 289 2v). If I am not mistaken, wasn't the fairlane 302 2v an F code? I just can't see Ford not differentiating between the 289 2v...