Ive been running 7800 RPM on my stock 360 crank for 8 years. Its a standard crank, Eagle H-beam rods, KB pistons, and the bottom end balanced. I recently pulled the motor apart to change the pistons when I added the Eddy heads, and inspected the bearings. They looked brand new. Plastigaged right on, and 80 psi cold, 55 hot at idle.