are those VS50465R only for the supercharged engines or will they work with all the 3.8l?

 

The superchared 3800's have different valve covers then the NA 3800's. The pic posted on the 1st page is a set for the L67 covers. You can tell because it has grooves for the fuel injectors to go into the heads (vs into the LIM for L36's).

It's not a hard job. The back cover is a little tricky but not bad. I don't even know why GM made a big deal with the recall and all. I had a fuel injector pop out while the engine was running and had gasoline POUR all over my headers with no fire.

But, I wouldn't want any leaks either, so if you have to pay $12-15 for a set of gaskets to fix that then do it.