Race last summer against my buddy's mildly modded 300ZX. At the time my only mod was a shifter, stock air box and everything else. This was soon after I bought the car. His car was definitely the faster one overall, this was later at night and it was still sickly hot and humid out, which didn't help him at all.
http://www.reidonly.net/videos/reidonly-vs-twnspin.wmv