383 `68 Dart valve cover choices with ex.manifolds

I found these at a swap , no wrapper to know who made them.
Sounds like what you needed. View attachment 1715186764
yup. that looks like the ones I used. They may be McCord gaskets.
I never tried it but the side of the heat deflector that is paper like material can deteriorate. I always wanted to try spreading a thin layer of black silicone II on the paper side to make it more durable.