Hi Downunder
Wish you well and please pm me as to how it all turns out. Just did 40 hours in 120 on a travelling holiday, very underated machine shame they are not still being made.
My only advice would be to not put any trust in the 15 yr + ext fixed overhaul cost to recalander the engine, it most likely will end in tears.
Sorry I don't have any costs for you, couple of guys in Queensland can do the work if interested.