Had a 1964 mini with sliding window not wind up window.
It was set up for hill climbing races.
1380 engine, hi lift cam, straight cut gearbox, hi-low adjustable suspension, twin side draft webber with the bulk head cut to accommodate it.
The thing flew like a motorbike to 100 MPH but by gawd it was hard to keep in a straight line over 100.
Good fun though :-)
Awesome mate, I had a 1964 mini with a bored and stroked MK1 cooper s motor it was 1420cc and had 110hp at the wheel's. Fantastic fun 😁