Rich Idle AFR reading

Your engine is stock right; just bolt-ons. The cam,compression, and heads are factory. Those are the parts that have the biggest influence on the timing requirements.

The electronic ignition is nothing more than a maintenance-free trigger. It does exactly what the old points did, except wear out, bounce,leak voltage, oxidize, or weld up

Again; set the T-port sync. Then use timing to set your idle-rpm, be it 5,10 or perhaps 12 to 15. The more you give it now, the faster it will idle. Shoot for 700 with a stick; it's harder to stall....... unless you have a truck with a granny gear,lol, then 600/650 will be fine.