e MO native.
Northern Pecan Cultivars
Shepherd, Oswego, Kanza look like good scab varieties. Not sure about commercial availability though. He sells scion wood, but is done for the year.
Quora discussion about pecans. With good care and a good location you could have pecans in 4-5 years.
Do not try to graft a pecan tree on hickory understock.
Not “scab” but “scab free” varieties!