I finally got the toilet set and no leaks. Well, had 1 leak at the tank to bowl bolts because they were too loose. Fine now.
I used an air hammer to break up some of the inner cement in order to pour new 80lb bag. I covered the pipe that had the lead sleeve in it with a scrap piece of 4" pvc. I had to remove some material from the pvc to get it to fit over the pipe just to be able to pour the cement. I coated it with oil as a releasing agent, then poured the cement.
I ended up using the pvc adapter and pvc flange even though I bought the Sioux Chief 887-GPM. The 887-GPM was not tall enough. I thought I could remove enough cement for the ring to fit, but no.
I covered the bottom of the pvc flange in silicone tape too to make it airtight and solid fit. I used 5/8 ply over the cement with the adapter top just below the top of the ply.
I used 1/4" tapcon to secure the ply to the cement, and also 1/4" to secure the flange to the ply. This will leave me about 3/8" of room to add the final floor finishing material tbd. I used a fluidmaster better than wax seal without the large foam spacer, but with the one that comes attached to the seal. I cleaned up the bottom of the bowl, set it, and tested for leaks. The tank to bowl bolts were not tight enough, then fixed. No leaks.
It may not be the ideal scenario, but it works without leaking.