318 race engine 4104230-318 any info. on these engines?

Where are you researching this? Just curious because I've never heard of a 318 race engine. I've read just about everthing Mopar related I could get my hands on for years and have never heard of it. But, that doesn't mean one wasn't produced. Either a 340 or a 360 was available every year the 318 was produced.