balancer diameter ???

My crankshaft snout measures 1.379 all along exposed area.. now what should my brand new bhj balancers inside diameter measure?? Is this incredibly simple or am I. ??

Don't know if you have read the installation FAQ:

http://www.sccoa.com/forums/showthread.php?s=&threadid=18410

It calls for a .001"-.0015" press fit. So, your damper should be honed to have an inside diameter about .001"-.0015" smaller than the OD of your crank. A little anti-seize is also recommended for the installation.