Anyone know Holley Commander 950's? programming?

I have no experience with the Commander however:

I think you can buy an LC-1 from Innovate for about $200 with gauge and sensor. It is possible to setup the LC-1 to simulate a narrow band sensor for the analog output. You can still read the WB A/F mixture over the data connection for tuning purposes. Narrow band control is typically bang-bang, if too rich, it goes to lean, and back to rich so the average is just right at about 50% duty cycle.

In the work I do, I tune open loop, and properly tune before closing the loop.