Cometic Head Gasket

Is this a 273? Mine had a porosity in the head casting near #8 plug. Coolant would just bead up and drip off the surface -- crack wasn't really visible to the naked eye. When I pulled the heads and took them to the shop, both showed a crack in the same region. One of these heads was a replacement for the original, which had been replaced because of a coolant leak in the same area. So I woud say that this is a problem endemic to these 920 heads. If sealing the stud doesn't do it, I'd look at it