Today while replacing my injector plugs with more user friendly Caspers' versions I found an issue with my truck.

What I found out was when I removed the supercharger in March of last year to replace a broken intake bolt, I must have switched the injector plug for #7 with #5 and vise versa. This has been that way since then. I made 452HP and 480 TQ and ran this truck daily like this.

I'm more concerned with any damage I may have done to the motor but how could the truck run like this since #7 and #5 cylinders are so far apart in the firing order (1-8-7-2-6-5-4-3)? Any help would be appreciated!