Geno, as you know the tires you have are a big problem. You may be able to hit low/mid 13s with just some better tires. I'm telling you, I bet I knock close to 1/2 a second off my ET just by dumping those BFGs (2.3-2.5 60 fts). It is a night and day difference, but ultimately a trip to the track will be the tell all. Are they open this Friday night? I think I can take you're 13.6.
Anyway, back to the nitrous. You definitely want a dry kit (easy to install and safer). Your 92 has forged pistons from the factory, so you're set there (unless the previous owner put in a crate motor - I would seriously doubt that's the case with only 50k on the car). I've already done a little research and I would have to say go with a system from ZEX (my favorite), NOS or Edelbrock.
Later,