Well, one thing to consider if you are new-ish at GM (like I am) and are a total n00b at LT1 (like I am). If auto, that's about the breakover point where they started sticking the 4L60E or 4L80E into everything. These are computer controlled transmissions which require control of line pressure solenoid, each gear's shift solenoid, and then the normal TCC (torque converter clutch).
The DFI I picked up on a steal only controls TCC. I'm currently trying to piggyback it on top of the stock ECM and hopefully the ECM will pick up transmission control correctly. If that bombs, there are standalone controllers in the $400 new range, wiring harness is extra.
Honestly? 20/20 hindsight, I'd have tried an FIC for this car. You'd need to call AEM and ask them if the FIC can deal with 360 degree optical wheels (Optispark is just like Nissan distributor pickups or CAS), if they say yes then it's game on.