Indeed the oversizes read 0.005", 0.010", 0.020", 0.030". The manual says any other makings after the serial number on the block indicates "special machining" and to include it when ordering parts. If i can figure out this damn scanner i'll post the manual
Was that true for all Wisconsin engines, or just older models?
According to the Wisconsin Parts Manual for the TR10 and TRA10 engines, oversizes were only .010", .020", and .030".
Link to Wisconsin Parts Manuals: Wisconsin Motors | Wisconsin Part Catalog Files