I got it off. The angle grinder wasn't doing a very good job with the aluminum, so I broke out the sawzall. 14tpi blade cut right through, had to make two cuts. Then wedged an old screwdriver into it. That split the steel collar and it fell off. I did set the bottom of the hub on a jack stand before I wedged the screwdriver in it.
Here's the old seal compared to the new one I bought for it:
As much rust was on the shaft in front of it, I am positive I had not replaced it. Plus the hub would have been easier to pull.
The shaft shows very little if any wear, but there were two small dings right where the seal ran. I did what I could with them and put the new seal in, driving it as far back as it could go. Bearing is not sealed, but no play on it.
I haven't found anything on in/out 'play'. The axle will move about .050" in/out.