Get a load a this!(slant 6 with a hole)

I had a 72 dart with a slant. I had a fresh engine waiting to go in so I drained the oil and run her back and forth to school for a whole week. It was about 10 miles one way. By the end of the week it was knocking like crazy but it never seized and still ran good. I decided not to temp fate anymore so I swapped it out that weekend. Yeah, they are tough engines.