360 Auto rear sprocket size?

Ive just acquired a '76 360 Auto and I've previously owned a near new AE430 so Im somewhat au fait with some of the traits of the Husky Auto. When I was doing some research a few weeks back before buying the 360, I came across a thread where a guy in NZ (?) recommended running the largest rear sprocket available to keep the revs high so that the gears were fully engaged and therefore you weren't slipping the "clutch" so to speak, i.e. either on the gas or completely off the gas was the recommend riding style for auto gearbox longevity. What is the largest rear sprocket available? 56T?
And yes I have bought a supply of UNIVIS HVI 26 to change after every days riding.

If it is the same sprocket that is on the 1982 to 1988 Sprocket Specialists will make you any size you want up into the 70 tooth range. They probably can make one for pretty much anything. They come drilled for headed bolts and countersunk for the aluminum swingarms. Of course if they ship to Australia is something I can not comment on. I also have not got one in 10 or so years.

At some point the part that holds the rollers in front of the sprocket needs (or at least should be considered) modified.

If I recall correctly if going back in year far enough the sprockets are double drilled for 8mm and a smaller set of 6 holes as well that probably is before 1976.