Wideband

myduster360 said
The larger the cam is, the tougher it is to maintain a stoich idle A/F(14.7).
So don't get your hopes up with that cam. The locked timing sure isn't going to help.

So I wouldn't go nuts trying to hit the perfect Stoich ratio. You'll probably find an A/F 13.5:1 makes your combo's idle and tip in a heap ton better while keeping idle vacuum off the PV. Give the motor what it wants, regardless of opinion polls.

With that said, a lean part throttle cruise is perfectly fine.

I agree. Only point I'd like to make is that 14.7:1 was never the best for idling. Even the CAP equipped cars only targeted 14.2:1 AFR. Standard idling for effciency and power is generally somewhere between 12-14. Stoich is not the most efficient or least polluting, its simply chemically balanced.