Get a drive shaft made that has a slip joint in it like on the front of most 44wd trucks. I had a very low mile and free 454/th400 setup from a motor home that I used in a 73 camaro. The trans didn't have a drum parking brake but it did have a non sliding bolt on u-joint flange. A local driveline shop made me one from scratch completely new for less than $300 out the door with HD Spicer joints. It worked great and didn't cost much more than having a normal shaft made since I never had one to begin.
