Oh man, how embarrasing. (Uncle Tony/Nick's Garage)

I thought AMC and Mopar lifters were just plain interchangeable until now. Maybe they were at one time, something change?

And maybe the motor owner only checked the size on the rod bearings and called the motor as having standard bearings, without having checked the main bearing codes at the same time. I would like to see the codes on all the bearings they discarded when they did the crazy build on that fateful Sunday.