kz 750 4 head gasket questions

Ok I have the 810 kit for my kz that I put back together yesterday and over lapped one of the oil rings so it was a great mosquito killer but I took it back apart this morning and the head gasket tore. My question is I have 3 oem head gasket for the 66mm bores and they measure 68.4mm. Do you think I will have any problems using one of them on my 69mm cylinders? There is a slight overlap and my deck height is maybe 1mm below the top of the cylinder. Thanks