kiwikid,
Yes and I had issues, see page 2 of this thread.
Basically aftermarket drip rail replacements are NOT same size as originals; slightly smaller in height. So, I had to change both left and right to mirror each other.
Glad I did though as I found issues with Driver side too. Not as bad as Passenger side, but a repair I will not have to worry about now later.
Note I also had a "leak" under dash and found that prior owner "stuffed RTV" in rotted spot under cowl. I cut that out, welded area back up, and now should not have any water leaks. Basically I ended up doing a whole lot more to cab and ended up basically doing a frame off resto since I also changed the cab mounts.
Hope this helps?