I have an AKM PCM interface cable for a 93 LT1 that was only used about 4 times. The cable was purchased new from wot electronics. You can check with them about what other years this cable is compatible with though I assume it should work with all OBD1 LT1 cars. $55 shipped.

I also have the book "How to Rebuild Small-Block Chevy Lt-1/Lt-4 Engines: Step-By-Step Rebuild to Factory Specifications" It Covers 1992-1997 Gm Cars and Trucks an is a necessity for anyone looking to rebuild an LT1 motor. The book is used but in great shape. There's a few grease stains on some inside pages but overall it's in great shape. $15 shipped.

Thnaks,
Rob Andersen