In case anyone was dying to know, my w56 had a 6307-N input bearing and a NUPK220556 countershaft bearing. I don't think it was the original trans since it was all sealed up with blue silicone.
As far as removing them, Tractor Supply Co. has an 8" 3 jaw puller that worked great for the input shaft and a small pry bar works nicely on the countershaft as long as you protect the gear underneath it.
I have ordered the bearings and hope this takes care of my whiny transmission.
