Hello all, I am currently trying to purchase std replacement pistons, rods and bearings (both crank and rod) for a 1997 Toyota glanzaV but I have hit a problem! the pistons are listed as Mark 1/ mark 2 and mark 3, now toyota have explained that Mark1 (part no: 13101-11111-01) = 73.900mm and 73.910mm Mark2 (part no: 13101-11111-02) = 73.910mm and 73.920mm Mark3 (part no: 13101-11111-03) = 73.920mm and 73.930mm I have no idea which one is needed for the engine? It is just standard replacements im after, anyone know which one it is and/or why there is the choice? THANKS!!!!