Do not change the opti. Find a different mechanic. It's working, leave it alone. When you need a "tune" do the plugs, use Delco single plats, and wires. How many miles on the car? €Be sure your Opti vent harness works. The vacuum line should hold a piece of paper.
Don't believe what a lot of people both here and "mechanics" tell you regarding the opti. I have 371,000 on the original opti with an MSD cap and rotor set.
Getting a real PCM tune would do good from one of the vendors. I like PCMperformance.com. You will get better performance from the engine and trans and increased trans longevity with crisper shifts.
'95 9c1, pcmperformance.com 93 tune, Dynomax Ultraflo catback, K & N box filter, LT4 KM, 160 stat, 3.08 Posi.