BBM Stroker cranks 4.150"

I have one in our 400 stroker truck pulling engine that turns 8500rpm making 800HP, been in there for 3 seasons now. And I don't think its "On the edge" of what it can handle. These cranks are strong, they have the Big Mopar rod journal so there is a fair amount of overlap on the main and rod journals, that makes a crank strong.