Mopar 4.5" Crank

Does anybody know who was making the Mopar Performance Billet cranks in the late 90's early 2000's? I just bought a used 540" motor for the top end and when I opened it up I saw all the Mopar rotating assembly. The part number on the crank is P4876011. If anyone has any info on this crank, I would like to hear it.