Originally Posted by John_Kunkel
Originally Posted by migsBIG
The second crank has this weird type of machined riddling on the front, something I’ve never seen before


It's called knurling, used to expand/restore the diameter of a shaft that's been worn undersized or otherwise damaged.
iagreeJohn nailed it up


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