I don't believe it would be that difficult to replace, pretty much unbolt the current components, remove them and install the new ones.
I also still have the Yacht Specilities pedestal that came with the boat and was removed when the boat was converted to tiller.
It is in decent shape and I need to get rid of it if it could be of use for parts.
All that said, I really enjoy have the tiller on the boat. The boat is much more fun to drive and has a lot more feel thru the tiller.
The only disadvantage seems to be under way with a full cockpit of people - 4 people aboard - not much of a problem 6+ it's pretty tight quarters in the cockpit. But usually its 1 or 2 of us aboard and its great. With the tiller I am sitting in the forward part of the cockpit or with the tiller extension up on the cockpit comings with my back on the lifelines. At anchor the cockpit feels like twice the size. When under autopilot the tiller is standing straight up and out of the cockpit. No pulleys, cables, etc to maintain, greater access to the aft portion of the engine compartment. Tiller pilot or Pelagic Autopilot with a linear drive could be used on the tiller although I have a WH autopilot below decks and it works really well. Working on a way to attach the control lines for the Monitor Windvane and keep the tiller out of the cockpit or in an upright position.
Oh, I always found the Edson people helpful, boat shows, on the phone etc if you decide to go with a new Edson pedestal.
Just a bit a bit of input.
Crazy Fish - Maintaining, Upgrading and Sailing a Crealock 37