8 1/4 pinion height

I'm putting a sure grip in my 8 1/4 I got all the bearing sizes worked out. I know I have to shim up the pinion gear behind the race. Looks like I need about 1/8 in shim does that sound right?. Does anyone have a dimension from a dummy shaft fitted in the carrier bearing race bores to the top of the pinion shaft bearing ID bearing race. I can't find the set up tools mopar used for anything Thanks Jim