Switching over to a w56 or W59

im switching out trannies and I got a question or two.

1. I wanna go with either a W56 or a W59. What are the pros and cons of these.


2. I currently have an l50 I think. Either way I need a new clutch master cyclinder. Will the one I have now work with a w series trannie or would I need to get one that is made for a w series trannie?

 

behind the w56 you can run the gear driven cases which to me is a big plus. What front axle do you have and what side is the front differential?

 

I have no idea what front axel I have. I'm guessing whatever Toyota threw under an 82 at the factory. But the differential is on the passenger side.