Lean idle. Rich cruise.

If your cam was a little smaller, I could tell you exactly what to do for the low-speed circuit; but the biggest I have tuned is the 292/108 Mopar, that measures around 248/249 @050.
On that cam, I ran it at 12/14* idle timing, which required the throttle to be opened too far up the transfers . I fixed that by drilling the Throttle valves to allow closing them some. When I got it right, the 750DP would idle on the mixture screws set near or a lil less than 3/4 turn. Once the T-slot was synced up, She'd idle down to 600 and less by retarding the timing.
To get the bottom end torque back, I ran a two-stage timing curve, giving 28*@2800, then slowing to 34* by 3400. This allowed running 87E10 at 11.3 Scr with alloy heads no problem. To get some Part-Throttle torque, I ran a modified V-can of 22* Thus, at 2800 the timing was 50 which was not too much. To explore what the engine wanted, I bought/installed a dash-mounted, dial-back timing module with a range of 15 degrees. She wanted from 60 to 63 degrees. I needed some Idle retard to smooth out the idle at 550, for idling around the parking lot (@5*), with 3.55s and an A833, so that left 6/7* for cruising and so, 56* is all I could give her. But my ancient carb did not have a 4-corner idle, so drilling was my best option.
AFRs?
IDK, the Edelbrock tool couldn't figure it out and finally crapped out. To their credit, Edelbrock warrantied it. But it crapped out again later, and a NEW Sensor didn't fix it. So I put it on my wall of shame.
AFR's?
I tuned it by ear and it ran fantastic. It only takes a lil longer without an AFR gauge.
Well, to tell the whole truth, I yanked that cam out before the summer was over. It did not like 3.55s, and that was all that I was willing to run. I replaced it with a 223@050, and I was in heaven for the next four years, until the cam dropped lobes right after an oilchange, in around 2004.