This a look down the #6 cylinder of the Ford 351 Cleveland, that makes 615hp with Stock iron 4v heads. Had 30% leakdown, so continued with evaluation using the DXZtoz Borescope. Is this piston fractured? make your comments. Want one of these scopes, here is the link #dragracing #racing #leafspring #ford351 https://www.amazon.com/vdp/0b2a535607974636a4904759c36aacd4?ref_=aipsfvideo&linkCode=ssc&tag=timothyr.hals-20&src=aipsf | Tim Halstead