just bought a brand new oem flywheel for my 88gt.(I'm also installing new clutch and accessories) When I took off the old wheel there was a spacer in between the wheel and the crank around 1mm thick. I would guess this was maybe used if the flywheel had been resurfaced to take up the thickness machined off. But I never resurfaced the flywheel so I don't know for sure.

Are these types of spacers normal from the factory?