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

Hey guys i recently bought a 74 scamp and along with it came a 318. thinking that it was just the run of the mill smogged up 318 i put it on the garage floor and began my search for a bigger and better 360. I got bored one day and decided to look at the casting number on my 318 to see what it came out of and what time period it was made. The number on the side reads 4104230-318-11 and when i did some more reaserch it turns out that it should be a 318 race engine. I personally know nothing about these 318 race engines and I havn't been able to find anyone who does. Lemme know if you guys know any info on them, it would be appretiated. Thanks