post badest stock stroke small blocks

One of my friends now races SS, but has held records in D,E,F, and M Stock with his Mustang. It is unbelievably competitive, and much more expensive than a braket or street build. Expensive if dyno time and personal time. Down to the SF flow bench he bought for his personal garage. I'll add the only reason he and I got close and he would talk theory with me is I was not a class racer, and didn't drive a Ford, or run in those circles. Otherwise we'd only have been able to talk about the weather...lol. He told me so...