It's called an "M1stang" (M1 is the designatiion for the first generation Miata, the one with the pop-up headlights).
http://www.m1stang.com/The guy has only built a couple of them, so finding out the owner shouldn't be too hard. There's a phone number on the web page, and on the "more photos" page, ther is the pic above, plus 2 more photos, one with several people in it who you may be able to identify.
I think that the couple that have been built are stock, but quite a few Miata enthusiasts are of the opinion that it would be just fine with a 5.0 conversion.
Mosca