Oil Splitter Plug -- 360

Guitar, I'm not sure why you're so adamant about leavng it in. Basic cleaning of a block before assembly means every passage all the way thru. That's the "mantra" everyone follows. Especially any oil passage. It's there because of the way the rest of the passages were drilled. You're right. But it's a place for debris to collect during running, and block machining, and the only way to clean it out is to run a brush from top to bottom, and front to back, to clean it out. Also, I'll have to look to be sure, but I'm pretty sure most Mopar specific books have a note about removing it, and making sure it's put back. I guess I'll happily disagree with you on that one...:)