This is the lowest I ever had mine.
https://lateral-g.net/members/akes/
19x12 with a 345/30. At this ride height you will get mild tub rubbing on the inside and you need to be careful of your pinion housing contacting the floor, rear end cover contacting the cross bar in back. They have curved lower control arms now. I had the straight bars on mine and it would rub under heavy load. This was with about 2.25" of shock bump travel.
Best thing to do is mock it up at ride height without springs on the shocks. Run it through full travel.
Bottom line, it will work on a rowdy street car. Not a car that will be raced.