But, the z6 is also 10 years older, and parts are 10 years harder to find.
vtec motors and parts availability usually don't belong in the same sentence
if you want something for a z6 you can find it easily, and usually cheaper
and the OBD1 motors generally have more support than obd2
I just don't think its worth the hassle for the 15 hp
i wasn't too impressed with my z6 hatch, just a grocery getter
now once you slap a turbo on it, now you're talking