I would respect Victory's information, yet the factor of 60% is pretty much carved in granite for big twins H-Ds (and yes, Chiefs back-calculate to about 64%, yet some Scouts may have been much higher; there's info at [URL=http://www.hjem.Get2Net.dk/Virtual-Indian] As I said in my direct post, I haven't made up plates for 45s, so it would still be more convenient for you to whip one up locally. Just worry about making one bottom plate out of 7/16' thick or better stock of anything: steel, cast iron, even aluminum for the bottom. I cut my first ones from steam pipe flanges. Have someone lathe cut a hole that the spigot will slip through, and tap four holes for studs=youre there!
If you look at vintage Clymer literature or "Essentials for Speed" you will see that the fixtures suggested for securing the cylinder for honeing are in fact torque plates...Cotten
[This message has been edited by Cotten (edited 23 December 1999).]