First of all juniors, welcome to Oldgas, the best darn petro site on the web.
The Tokheim 39 was built in two different sizes, a tall, and a short. I dont have the actual measurements, but the tall is about 6 feet tall, and the short is about 4 1/2 feet tall. Another thing to keep in mind, is just because its short, it mave have been cut down. This was a common practice to "Modernize" the pump. So it would be a good idea to measure the skins before you buy and have them shipped.
The Tokheim 39 is a very common pump with collectors, so parts should be easy to find. Keep us posted on your progress. And take lots of pictures. For you, AND us.