Don't ever use liquid gasket on a ZA50 engine. These are the most unforegiving engines you have ever seen. The germans build them on a scale of presicion of the up most tolerances. So you need to Measure and Measure and remeasure. The snap ring is 1mm off as when they remade them at nice/rich factory they built. You'll need .1mm shims to correct the starter plate problem. You need to shim the output shaft outside.
Yes, you may have to use a .012 and .004 or 2 .008 to get the correct tolerances/play on the main crankshaft bearings. I only use the brands of sfk or fag bearings. Brand of bearings does matter imo as the design of the bearings have change... the thickness. You need to set the crankshaft to ZERO end play paz stated in one of his posts while back.
Here is some video about things that no one else addresses but me.