On our 452 with Edelbrock RPM heads we have HS 1.6 rockers and Moroso stamped steel covers, with the Moroso blue silicone gaskets. No hitting so far. I think Dan (RIP) had to do some trimming of the baffles on our old Mopar stamped steel ones with the same rockers. It was not much as far as I can recall. The Moroso are similar in size as far as I can tell but will have to double check the baffle arrangement (or lack thereof) the next time I have them off.
Not sure why anyone would bother with stainless steel inside an engine, it is covered in oil all the time. Why not go with a good quality steel alloy.
