You can get some variation depending on how you crush the soft solder if that's what you use .The only ones I can remember ,with a gasket is an 038 mag ,stock about 46 thou . A 200T at around 36 thou . Could vary some .Some people use dial verniers but I'm old school and use a set of manual read Starrett 0-1" mics could be off a few thou .I trust the mics over the verniers .
If I cut a base I always use a gasket and try for 22-23 thou head deck, piston crown clearance I miss every so often and have to cut a thicker gasket . Things happen you know .