oh heck no. by the way i looked through your shop and i have a question for you that you m,ay have some insight into. as we know cases are molded in sets,right. therefor the tolerances are within acceptable limits from one side to the other for reasons that also know. ive built well running crankcases from halves from different molds. so far i have yet to spin a crank bearing, or even have a seal leak for that matter. . so what is your opinion concerning the longevity of a case that has been built from different molded halves? i only ask you because of the right half you have there for sale.