Smallblock efficiency or How to have your cake and eat it too

AFR gauge is a game changer, I'd argue a vacuum gauge is as well, really helps dial in the part-throttle stuff. It's also a good monitor for overall engine health and tuning changes and helps save gas when you can visually tell how much load your right foot is putting on the engine as you drive.

I've had one in my car since 2010 and I'd feel weird driving without it, I watch it a lot while driving... it's fun lol