first time poster *here* looking for measurement

[FFredo]

Hi guys, I've never posted on this section before since I have a 1959 Apache.
I recently started a modification on my truck envolving going full on flat bed. The frame is completed for the bed now I need to source out my tail lights. My bed frame is 2X4 sqr tubbing. So I only have room for something around 3 inches tall. I like the look of the 63 tail lights and think the would be great if I turned them on their side.
This brings me to my question. Can someone give me the outside demensions of the 62-63 tail lights encluding the trim rings?

Thanks in advance ya'll
Fredo San Diego CA

For reference, here's pics of my project.