408 tuning with a Wideband sensor

Swapped out the 72 mains that came with the Proform body for 70s after work today. I probably won't test it out until my drive to Escondido to meet up with Mad Dart tomorrow. I also changed the plugs because they were pretty nasty from running so rich up until now. Once the main jets are dialed in I will probably need to richen up the PV circuit to keep it from going lean under power. Maybe I'll get lucky and it will be good as is. (yeah right)

I'll gladly give you a hand with your's, Louis. After this I should have plenty of spare Holley parts laying around.