Since you are going to rotate the motor, it shouldnt be bad installing the James blue seals. However, if the motor is not going to be rotated, the stock Harley seals are probably the better bet. Even if you want to do the blue seals, you may want to also pick up a set of Harley OE seals (they are cheap from Harley and even cheaper from any independent shop), just in case you realize the James seals arent going to work out.