That seems to be a common theme with us V8 guys, I spent days looking at valve covers before deciding on something. Some had oil fill holes and PCV holes, some didn't, in the end a bought another set altogether. I had a set of Cal Customs like yours but someone had already butchered the holes, I really like the Corvette valve covers but needed PCV holes.

This is what a ended up with, I'm really happy with the loo. Now I just need paint.
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Valve Covers & Air Cleaner


~ Craig
1958 Viking 4400
"The Book of Thor"
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1960 Chevrolet C10
"A Family Heirloom"
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'59 Apache 31, 327 V8 (0.030 over), Muncie M20 4 Speed, GM 10 Bolt Rear... long term project (30 years and counting)

If you don't like driving yourTruck, you won't drive yourTruck..| Living life in the SLOW lane