Sealing Stamped Small Block Valve Covers – Grrr

I used the Moroso steel core gaskets, they fill in the gaps the best, in my opinion. I am surprised that you had some issues, but we all have seen different things work and not work.
They are on the high side but works.
I had the same problem only w/ cast mopar covers. They are way more ridged than stamped too! header heat on my raised port heads burn them around the center cyls. I had to got to the expensive ruber/steel reinforced gaskets, wrapped the headers,and built a header wrapped guard
between the valve covers and the high header tubes (big block )