I just put a set on my 440 with mp cast covers. Years of bs with cork, fiber, silicone. Put these on dry no leaks, and have pulled covers a couple times. I'll never buy anything else.
That is what I use BUT I do have alum heads and block which I know are nice and even. I have taken them off and on several times and no issues and I only use 4 of the 6 screws to hold the valve covers on.
That is what I use BUT I do have alum heads and block which I know are nice and even. I have taken them off and on several times and no issues and I only use 4 of the 6 screws to hold the valve covers on.