They are removable, I had to do the procedure on my 1990.
I don't have the pics but it's easiest to do if you have the lamp out of the car. Just remove the sidelight and main bulb covers and you are done.
Jay
i love the yellow look
Think it took me around 10mins to work out how to sort one lamp and the other one took minutes.
We're going back 5 years or more so the memory is a little cloudy..:haha: