Differential Assembly Question


I am putting together a diff spreader to do the carrier bearing pre-load for my Dana (C4) assembly and a friend is going to be assembling his 67 diff soon also.
My question is if anyone can measure the spacing on the holes for the spreader pins on the c2/c3 diff and the hole diameters. 7/8 is common on most diffs, I just don't know the c2/c3 stuff well enough.
Most spreaders have several holes to cover different units, however the I want to make sure we can both use the unit for our assemblies.
I realize many people sell spreaders, however I can get the material for about $40 and I'm handy enough to put it together.
Thanks


