I would keep the 67, buy the 69 and look for more! Never can have too many, right?
That 69Z better have some iron clad docs or it will be harder to sell as a Z than a condom to a nun. Most that would buy your 67, would not care what engine was in it except that it ran, sounds like yours runs like stink! But a Z is a car that became legendary because of it's engine. A person wanting a Z, but short on cash, may buy a car with NOM, or, just as easy, they can slap some Z emblems on a reg. 69. But most who want a Z, and prepared to pay, want a born with drive train car. There seems to be an endless market for 1st gens. and there is one for almost any budget, but if your reason is that the Z might be a better investment with a greater return, I'd say fogettabout it.
That red headed 'kid' in the other blue 67, don't listen to him, he's huffed too many big block hydrocarbons! 69's rule!(All 1st gens rule!)
