I know this is an old thread. I am also a new member. I just thought something needed to be said here. There has been a lot of unwarranted bashing of Moroso in this case.
First of all, the part is long discontinued. I don't really see where the manufacturer has a dog in this fight but that's beside the point.
Second, it's an extremely light weight RACING part. The average enthusiast cannot slap a set of these on their engine with acceptable results. They require some creative gasketing and very gentle pressure on the fasteners to prevent warpage and leaking. RACE part.
It's a given that all race parts should be carefully inspected and cleaned up/modified to suit the builder's purpose. If you want to slap the race look on your weekend hot rod Moroso makes chrome steel covers that will work fine for that.
Lastly, that tab is an OIL DRIPPER!!! The sharp stamped edge of the filler/breather hole will collect oil as the engine runs. Without a dripper there oil will collect around the sharp edge and be pushed out the breather when the engine is running hard!
That little tab collects the oil that collects on the inside of the cover and drips it back into the head.
Yes, you have to be careful not to break off the tab in your engine. Yes, racers used to discard those covers when the tab broke off and replace them with new.
Just because you don't understand something doesn't mean Rick Moroso did something wrong. I'm just sorry he didn't know why they were there...
