Great little engine. Domestically produced hyd. pump., and I think the radiator was made here too! Otherwise, Fiat drive train.
The major problem was the archaic PTO clutch/drive system. You had to pull back on a long, HARD pulling handle to disengage the PTO clutch, pull up on the PTO shifter, then release the PTO clutch lever to get PTO operation. The shifter would grind, and the whole operation was cumbersome, so people would leave the PTO engaged, and leave the PTO clutch lever locked back. This throwout bearing pressure would over come the crankshaft thrust bearing, push the crankshaft forward, potentially causing a lot of damage. When I quit AC(dealer) in 1984-85, I had already put a new block and crankshaft in a 6080. AC had a retrofit program where an external Timken type bearing was installed off the front of the engine, giving you lots of thrust bearing protection. I installed several of those.
We had a 6060 on the farm. It should have been a 6080, but that's another story. Lots of power(keep it wound up) and economy. When Dad and I went our separate ways, neither of us wanted to buy the others half, so we sold the 6060 with just over 4000 hours.
I recall parts being a problem way back when. I can't imagine it's better now, but you never know. OEM parts are more readily available for my Fiat/Allis dozer now, through New Holland, than they used to be.
The turbo would be the least of my concerns.