Womanator is a prime example of what you can do with a stock block. His stuff is fast. Whenever I see people arguing about what stock blocks will take, Womanator always pops into my head. I don't know how many runs he has on all his stuff combined, but it's a lot. All with stock blocks I believe. I'm not experienced first hand, but from all I've read and seen, the stock blocks are strong. You thought about adding a girdle? I would do that.....that's about all you can do now and run it till it splits in two. It might surprise you.
You think maybe the stroker will get you into the 13s? lol