Yeah, the valve covers look great but they really don't fit the head perfectly, they are too big.

I have the same heads you have. I would recommend Indy valve covers to you.
The holes usually need to be opened up slightly in those covers to fit properly (Hey, it's Indy).

My second choice in a cast valve cover is the old mickey thompson/holley type but even those are a little wider than they need to be....but they have
worked great for me.

The next ones I want to buy and check out are these Summit house brand, which to me looks very close to Indy products but nicer finished, and also less expensive.
https://www.summitracing.com/parts/sum-440350/overview/