I did end up installing a small grind to fit limbsaver.
I want too happy with the finally fit, my own fault. I'm not sure the easiest way to bring the rubber down.
I tried freezing the pad before I starting grinding it down. That didn't really help. The rubber was all over my shop from my bench sander. I used 220 grit pad.
I'll see how the pattern from the link above fits.
I did contact H-S, they will install a recoil pad, just not the Limbsaver for $145, I didn't really want to spend that much at this point. They have to repaint it so that's why it's expensive. Even though it would be done right. At this point I'm not 100% sold on this stock anyway so I didn't want to dump a bunch of money into it, the pad I bought was 22.00.
Getting the old pad off is kind of a bitch, it didn't break clean, so I used my bench sander to square it up.
Just remember there is nothing to screw the new pad into, I found another forum where a guy installed wood sleeves with JB weld and used a bench grinder to square up the end, I forgot the site though.
Don't use softwood either, stupid mistake by me, I ended up redoing mine. I'm not sure what would be the best material to use.
I ended up with Oak 5/8" dowel and JB welded it into the stock.