I've used the search function and it hasn't turned up much at all. . . so
What sort of highway mileage do Z31's get? There are a good many for sale not to far away, the SF bay area - 3-4 hours away, and the prospect of getting a 5spd NA 2+2 and ending up with a turbo'ed engine seems quite reasonable after looking at a number of the how to's.
With a boost controller, intake, exhaust, and possibly a FMIC how would a 9:1 turbo engine do on the highway? almost all my driving is there, and well, I do enough that it needs to be pretty good.