Don and Rick-
Wrench is referring to Crane's steel distributor gear that is advertised as being compatible with billet cams. See link below.
http://www.cranecams.com/index.php?s...&lvl=3&prt=113
I think I may run my Mallory distributor "as is" and check it in the first thousand miles or so. If it shows excessive wear, I'll consider switching to the above steel gear or a poly gear. JMO.
phil