Ok, it's not unknown to hardcore Mopar racers. But it was certainly unknown to me when I tripped over this weird looking small block in a pile of parts @rocketresto dragged home. Since then I've gotten an education on the evolution of Chrysler's LA series small block long after the original performance variants had left the production line. So on today's episode, let's take a close look at this R block and see what there is to learn.