Mopar 4.5" Crank

in my 2001 MP catalog just says 4340 Billet... 4.5 stoke "RB" (balanced)

Maybe someone that has been around MP for while would know. Like at Mancini or Matt at Glendora Dodge MP.

ns1rm21 is Troy Bray from the old Westoaks Mopar Performance. Good chance he would know/remember. PM him.