Go to www.specmiata.com. Click on the forums, then "Spec Miata Garage." There are 9 or 10 threads, excellent reads, from a guy named Steve Schieffler I think. He tore down 3 SM "pro" motors. Some VERY interesting finds.

Let's just say that "spec miata" is not so "spec," and that there is a reason a top SM motor costs $6-8k.

If Spec E30 is even half as popular as SM, it will suffer from the same affliction.