valve cover gaskets

Brian T n Trailbeast,
These covers came with bolts and washers. Hopefully that is what I need. I have them all started and they all worked. Am I going to have other problems?
Looks like many good options. Thanks to all for the replys.
Rod

I bought mine used and they were supposed to have come with the hardware, but they didn't get packed with the covers for some reason.
The seller eventually sent them, but the ones I bought were a lot nicer.

Due to the hump in the middle of the heads I needed slightly longer bolts, and had to do some creative modding for the gaskets to get a seal on the ends.
Dry as a bone for a year though.