Photoshop help
https://ls1tech.com/forums/generation-iii-internal-engine/341226-anyone-have-overlay-112lsa-vs-114-lsa.html
https://ls1tech.com/forums/showthread.php?t=341226

The black lines are the one from the other dyno graph, I had to make them dark and thicker to select them. Hope this is what you were looking for.

