You may want to check with Skye Performance in the Smyrna, TN area...that or Z1 since you're not that far from there either. Skye doesn't actually work on Z32's, but they'll do the tuning.
1994 300ZX NA 2+0 (sold March 2017) 1993 300ZX TT 2+0 2008 350Z NISMO #1242