If you do install turn signals I would recommend including a BrakeLighter, it is a high mount 3rd BrakeLighter and adds greatly to visibility. Those old tail lights can be pretty dim against those modern LED lights.
http://www.jandlenterprise.com/products/products.htm
I installed one in my 36 and it was really easy and effective.
I have a 36 on which I installed turn signals with the kit from C&G. Since the Brakelighter is LED, won't I have to change the flasher?