Yeah I really do appreciate what may be new and worth coin. If though you find a "Rusted Out" TD wagon are you buying a good motor ou of a neglected POS?? Or risking a motor that has probably also been neglected? Almost certainly the latter.
A written off would be a better option IMO. I have no idea but do you need the TD Loom for the conversion? Certainly all the bolt ons will be needed on the engine.
You should get a pen and list what you actually want to keep on this car. List t, write it down. Value it. If you sell the car how much of that list can you take off first and not affect the sale price? -(bonus stuff)
If you sell your very sweet TB GQ ready to go you will get good coin for it. You are then looking for a very nice TD42 Wagon that will likely have a nice lift, a locker or 2, bar, winch. Happy days! Drive on!
I brought back my written off GQ way back when I drowned it because I thought the stuff fitted to it was worth keeping. Silly! Should have taken the money and bought again.
Just my thoughts mate, happy to be the guy steering you another way. ;)