Werkhorse is right .. the ole Fee-art trucks are practically history. You've been struggling to get parts for them for the last 10 or 15 years. They sold a few here in W.A., and there's a mob right next to the GreenDog Truck Depot in Embleton that sold parts for, and serviced Fee-arts for quite a long time .. but I seem to recall they've pretty much given up on them, there must only be a dozen left running in West Oz.
I did some dozer driving work for a bunch of dinky-di Eye-Ties, back in 1997 .. Lucchesi is their name .. just East of Kulin. The Lucchesi boys like their Eye-Tie stuff .. but they like Cats and Scanias too. Anyway, they have (still got, I think), an FD-20 Fiat-Allis dozer (Iveco engine), and their float truck was/is an NC170.
I drove the ole NC-170 a bit, for the 8 weeks I was working for them, and I was quite impressed with it. It pulled well, and drove well, and wasn't too bad an ole rig at all.
Mind you, the Lucchesi's had owned it from new, and it wasn't abused, and had done 95% bitumen work, so it wasn't a hard-worked truck by any stretch of the imagination.
All the Fiats I've ever seen working, and had anything to do with, were quite robust rigs, be it dozers, trucks or tractors.
David, that's a couple of nice old antiques you got there. I never cease to be amazed at the really old equipment that appears at the likes of Dowerin and other local shows.