who did the porting? IMO if money is no object just send your motor to a builder and have them do everything. In this hobby how fast you can go is all regulated by how much u wanna spend. if you do it yourself get some bigger carbs, cool head, and a timing plate. those are the esintals.
you need to rejet those carbs. your starving your motor. get some bigger jets and try it out. then do a plug chop. if you dont know what that is you need to search and read around some.
and i have a set of chrome FMF fatties for sale if ya need some pipes