Haa, Yea my first integra was a gen1. It was really fun, but almost absolutly no aftermarket for that beast!!. even the cold air intake I had to make myself (thank you Home Depot). All you can really do is get a custom exhaust, and really it isnt worth it.
Keep the gen 1 for you A-B driving, save ur money for a 90+ integra. trust me!!. Gen 1's are nice and light, the gearing is nice and short, the handling is pritty good.