Vintage Speed valve covers

Got a pair of these and they look real nice. No name, no holes, 7 rib and highly polished. But when I start the engine (327, big cam, STOCK rockers) the front and rear rocker arms on both heads hit the cover. I put a pair of way over priced double cork gaskets sandwiching a thin piece of aluinum on. It helped, but the rockers are still kissing the covers. Going to try grinding the covers where the contact is happening, but is anybody else having an issue with these?
Any other solutions to my problem?
Thanks

 

I tried to work out some issues I was having with one of his 2x2 carb adapters... he wouldn't even send me a new one till I sent the old one back and I had to pay shipping to send the gimped one back and shipping for the new one?? I don't buy his stuff anymore.