i think i have a used .20 over wiseco, used last year for a few months, which i had a broken leg most of that time, but still rode, ken oconnor just did my porting and found my cylinder to be overbored by a few thousandths, so i went bigger, i think it's useable, i could ship it to ya and you be the judge, do a ring end gap check, worst case get new rings????
both my bikes now are 67mm, .40 over, so this one is of no use to me
pm me