Do the 318's have a rear main seal?

Uh............actually...............this CAN be TRUE

Although I'm sure it was not intentional, a Monday? Friday? vehicle

Years ago our shop had an S-10, which had ?? around 100K on the clock. It was leaking oil, and we just "lived" with it. But if you went "on the road" it REALLY went through some oil, not so bad around town. Boss's daughter finally got ahold of it, ran it out of oil, and seized it up

Boss wanted me to tear it down and "see if we can fix it." I told him "sure, but a long block is the way to go."

But he wanted, so I did

So I've got the GM V6 laid out on the bench, upside down, empty block except for the crank, and I have all the caps off inspecting the crank and bearings.

I notice the oil seal area of the crank looks "nice and clean," as in no wear.

I look in the block, and my jaw drops. I look in the cap and my jaw drops AGAIN. This engine had never ever been touched since new, and it HAD NEVER HAD a rear seal installed!!!!