shim

Title about says it all. Swapping a 28 spline 8.8 axle from a 2000 ranger onto my 91 ranger, in the process of regearing with used 3,55 gears. Using the old pinion bearing as a setup bearing, dremeled it out to a slip fit, and am installing the pinion with the old crush sleeve, outer bearing...

Do I need a flywheel shim behind a new flywheel in a 1984 Bronco II? Vehicle came with transmission, clutch and flywheel removed. If one is needed, how thick. I see 040" shims for sale most often. Thanks for any help.