I went down to the local 'emporium' and bought a gram scale..balanced the rod piston pin and rings as assemblies,I know it isn't the proper way to balance but I did get them within a gram.they did have a 10g or so variance so it helped.The biggest bang for your buck balancing is getting your flywheel,pressure plate and clutch done as an assembly.
In line four cylinders have an inherent shudder,accentuated in the A with siamese intake ports ,mine runs pretty smooth,thouigh I dont know if the fooling I did with the scale was the difference..probably not
