Yes, I know how the shims are made- - -I have fabricated my own rod and main bearing shims from brass stock many times if I didn't have the right thickness. Hopefully, you won't need to adjust the bearing clearance by using the shims. If you've got a choice, a little loose on the clearance is always better than too tight!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!