[cptsideways]

For those running old skool clockwork diesels (bosch vane type) the hand throttle works perfectly in combination with the inbuilt governor on the pump. At steady state throttle the Governor adjusts the load up or down by about 10-20% to suit the input demanded. Uphill it'll increase the fuelling slightly, downhill it lifts off fuelling. The hysteresis on the pump is much more subtle than the factory CC.

I have run old Landcruisers for years, with the factory hand throttles & adjusted them to work in the 2500rpm range (60 ish mph) it works perfectly & is so much better than the factory cruise usually fitted. It also matches the natural speed of other traffic much much better, eg slowing uphills & speeding up downhill etc. Where the CC would simply floor it uphill & not gain speed downhill.