just trim the tabs. most sheet metal valve covers have slots in the outer edge to lock the gasket in place.
All the repro parts suppliers are now discontinuing the plain valve cover gaskets without the tabs. They are now only supplying the truck valve cover gaskets which do have the tabs.
In the last 3 decades, both types were included in a full engine gasket set, but not anymore.
They expect you to get an Exacto-knife and cut the tabs off if you are using them for a car.
Thanks for the info..Another indication that I have a car engine in my truck!
As a general rule, if the tin covers are plain, they are non-tabbed. If the covers have 'FORD' on them, they are tabbed.
Ted Eaton.
Actually the 1954 thru 1959 valve cover gaskets do not have the tabs whether its a car or truck.
Starting in 1960, the Ford Y covers be it a car or truck started using the tabbed valve cover gaskets. As a general rule, if the tin covers are plain, they are non-tabbed. If the covers have 'FORD' on them, they are tabbed.
Ted Eaton.