Thank you for the "cushion specs" offer, I sent you a PM. I agree with the run "as is" suggestion. I bought the hammer knowing it was frozen and anticipated a rebuild. This fall I planned to tear it down, starting at the tup. With PB Blaster, wrenches, and breaker bar in hand I started. After 2 cans of PBB and a TON of patience and time I was able to loosen the hammer from treadle to tup. The toughest and most time consuming was the treadle/break weight/tensioner. When I pulled the hammer out of the woods it was sunken nearly a foot. I am now able to turn the drive pulley by hand. I do not believe the hammer has seen heavy use as the tup guide adjustments are at the minimal setting. Currently in a holding pattern, as the hammer is stored tarped outside. Next steps are tup/helve attachment strapping, hard maple for the helve arm, cushions, and motor. I realize it will be looking for the proverbial "needle in the haystack", however I'm going to search for a single phase 900 rpm 3hp motor.
P.S. A HUGE thank you for all the responses to date.