A colleague of mine worked for various Indy Lights teams in the 90's, and still has photocopies of a couple packets of literature that was distributed by Lola for the T97/20. I have the Aerodynamics Information (road, short oval, including setup info) pack as well as a packet with engine specifications, wiring diagrams, fuel and oil plumbing diagrams, engine control module pinout diagrams, and more.
Before it goes in the recycle bin, would anyone like it? It's free to anyone who is still running or working on these cars. It's too big to scan, but I'll mail it anywhere in the lower 48. Send me a message if you want it.
-Andrew