Anybody break a stock block, if so at what hp?

On 275 drag radials 391's spool 1.60 60ft I ran a 11.09 I think at 121mph but it was leaning out pretty bad in third gear and was fighting some cooling issues I staged at195 deg with a flex fan (yeah I know) I'm confident I will run consistant 10:90 now some of those gremlins are worked out. I have no roll bar so ......I had one pass