Perfectly reasonable, monsieur!
These British upstarts!
There are great stories from that rally such as cars finishing stages with brakes actually on fire. The drivers were by-and-large completely mad.
The BMC Mini was by that time almost reliable, and it was a shock that a 1275cc car could do better in open competition with any car in the world. Those French didn't like it!
I have a 1275cc engine under one of the workbenches in my workshop which I might exhume and rebuild but alas it's not a 1966 version with nitrided crank and head ports would could drive a truck through, but I can make it flow as well and the EN16T crank, well, the basic saloon crank, mine is c1970 will run to 6,000+rpm safely...
Drivers didn't wear helmets and there were no roll-cages until sometime around them. A gentleman's sport.