I could use some help with idle timing and exhaust smell. Engine info might help. Ford 351W, Mechanical cam 238° @ .050" intake & exhaust, .510" lift, 108° centerline
Operating range 2800-7200 RPM. Atomic is controlling timing. What I've experienced.
Exhaust smells bad: Idle
Good throttle response.
Water temp increases slowly.
Idle target: 850 RPM
Idle RPM: 1000 RPM
Total RPM: 2800 RPM
Idle Adv: 10
Total ADV: 30°
Vac ADV: 14°
Vac ADV type: Manifold

Display advance at idle: 20°
I've read that advancing the base idle timing can cause issues with the WBO2 sensor and cause a rich mixture.
Would I try to lean out or enrich up this setup to change the exhaust smell (really hurts the eyes).
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Not much exhaust smell: Idle
Slow throttle response.
Water temp increases quickly.
Idle target: 850 RPM
Idle RPM: 1000 RPM
Total RPM: 2800 RPM
Idle Adv: 10
Total ADV: 30°
Vac ADV: 14°
Vac ADV type: Ported

Display advance at idle: 4°. Can any one explain why they these two setups react so differently?
Also, not to happy with hot starts. It seems sluggish compare to my last carburetor. Thanks.