I had the Total Seal rings on my 1776 engine. When I increased it to 2110 I didn't use them. I kind of wish I had.
I don't have much room on the engine side of the firewall because my electronic ignition is mounted there. Even though I have the CB filler/breather, my valve cover vents will have 1/2" hoses going to an EMPI breather on the other side of the firewall.