I'm thinking of dropping a 533 crank in my 256 engine eventually. I know what rephasing is and that its all the rage at the moment, but I can think of some reasons why I personally wouldn't want to: -The even firing sound of a parallel twin -The pleasant vibrations a parallel twin makes (giving it old school authenticity) . What are the pros and cons of rephasing? Is it simply something for racing? Does it increase bhp, torque?