i ordered a chassis harness for my formula. it finally came in yesterday so today i have the time to wire it up. ill take pics of everything as i go through in case anyone else decides to do this. it seems pretty straight forward with all the labeling. the harness i ordered was from procomp motor sports. its a 22 circuit i only paid 160 for it brand new on ebay. seems to be nice quality its all gm color coded. i guess we will find out if its worth the money when everything is installed and i test it out

 

Good luck. These are becoming more and more common as these cars age. Info will help someone