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

well that's exactly what i thought but what puzzles me is why there is no VIN stamped on the block and why the casting number says that it is a race block. I think that maybe it was a waranty block that was ordered from mopar performace possibly, not a race motor as much as a replacement. Thanks for your time guys it's greatly appretiated.