My 660 recently accuired a knock from the bottom end im assuming its a rod bearing. I have been looking at stroker cranks the +4 or +5 i think. What do i need to go with that to have a stroker motor.. Does it just bolt up with stock bore size... Also thinking of going with cam and big bore kit what would be the best way to go. Im new to this and money is really not a issue. Thanks in advance and plz excuse my stupidity lol.