Lack of understanding, embarrassment etc. Has left me wondering about this story. I for one would be hard pressed to believe that there are many forum members that could actually swap an engine in a Z judging by the horrible mechanical work I've seen over the past 45 years. I think it might be time to sell off this car as is rather than patch it up and sell it to an unsuspecting buyer. The Z can be a difficult car to drive for those without the proper experience or knowledge. Maybe work out a deal to let it go because I don't feel that your luck will get much better with this car...sorry.