Thats why I am asking to discuss. It was posted on a Camaro/Firebird third generation site and someone recommended it. So, this was before DEXRON VI was available. 700R4/4L60's were all DEXRON III
Click on the race car link towards the bottom.
4L60Es will chug along happily on just about anything. I don't see why Monolec 7500 wouldn't work well in them, stock or otherwise. Worst case you have to dump it and go with another ATF.