For some time the tacho drive on Perkins engines run anticlockwise the solution was backwards rev counters. Remember while Perkins are without doubt a great engine they are English after all.
Making a small effort to save the history of road transport in Australia by being in front of Simms
I have a little bit of Pommy stuff in the back yard from tractors mowers outboard and stationary engine and other stuff as well. The only thing that runs backwards here is the Aussie made farm pumper engine. Why, I don't know but it is different and not many people pick up on it when you start it up cranking over wnti-clockwise.
You can get a little plastic reverser box for cables,not very expensive............plenty of reverse rotation motors .....lots of marine applications used matched pair ........GM 71 s the whole motor can be reversed so everything is on opposite sides of the motors,and one runs in reverse.........the Smiths tacho is the expensive one ,......did you know the WW2 Smiths pocket watch ,used to sell at the disposals for 7/6d,is now worth $2000.