Me thinks my bucket and body were 1971 vintage on a 1981 International Farm-All. It was an Asplundh L-45 with a built-in hydraulic drum chipper and dumping chip body with lots of storage for oily saws and long-handled tools. The truck was diesel, and the boom also ran off a pto. I had a winch on the front for various uses, and it worked well.
I can not think of other features that truck needed, other than a tad more reach and a tad more chip capacity, and the bucket on the other side of the boom like the LR - IIIs. The truck was geared low for tight-quarter work, and .... it made me a lot of money.
This truck was built by Allan Fyfe Equipment in Toronto, an outfit that still puts lifts together for utilities and tree guys.