I have the same crank using with Scat I beam rods and KB744 pistons..it has mallory metal in front and rear counterweights...

that mopar crank is a Scat crank....

Tony

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)