Well. I got out the power drill instead of the cordless. After 1/2 hour of drilling I got it out. But just before I noticed I was hitting a rusty nail on one of the studs with the top of the Shower pan. I hammered it in then gave a huge pull and pulled out the pan.
It appears the Lead was more of as space filler. So iam not sure what happened. All I am is glad it is out.
Next problem - see you on the plumbing threads. Pipes going through studs, but no shut off to be able to cut the pipe - Darn