It might just thread it

 

Highly doubtful. The tangs are on the cap instead of in the valve cover. The valve cover just has a hole, nothing for the threads to catch.

I ask because I've got one of those awesome Lisle threaded funnels that screws into the valve cover for oil changes. Eliminates the need to be kneeling on the bumper, leaned all the way over, and holding a funnel in 1 hand and a 5 quart jug of oil in the other with your arms fully extended (not super comfortable).

 

Looking at my factory valve covers the isn't there just a lip and you can see two holes cut where the twist style will fit.

 

I just went and looked at my stockers. I see what you're talking about, but I think there is a slight threading in the valve cover that the cap grabs. Like the lip doesn't feel even on both sides. I guess we will find out when the ali ones get here in a month or so (yay backorder).

 

I didn't feel it so you could be right and heck I've been wrong before but my guess is that they will fit