Reusable b.b. valvecover gaskets

Cool, no prob. I just fired a 440/906 last night I built a cpl weeks ago and I used the blue gaskets on the iron heads with aluminum valve covers and they didnt leak, had to change to some chrome valve covers that were taller(baffle clearance issues and I didnt want to take the baffles out of the aluminum valve covers no biggie) and they sealed well with the chrome steel valve covers too.
Jr.