Your machine shop can spin it & determine how much unbalance it has (external balance) & IF that can be directly matched to the unbalance amt listed in the 360 MP flywheel conversion blueprint then you'll know if the seller was correct that it is balanced for a 360. But w MP poor balancing I would definitely have the whole shebang (re)balanced but at least you'd know if the seller was straight w you.


live every 24 hour block of time like it's your last day on earth