I remember seeing one of the first pendulum cut ultra lightweight NASCAR cranks at ABS years ago, it was very pretty and super lightweight. I'm remembering 35 Lbs. being the number for the SB Chevy and similar for both the Mopar and Ford SB racing cranks work
I've always been concerned on the additional cost and longevity factors on using one work realcrazy shruggy
Maybe soon luck

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)