Hi,
Four nuts tucked away inside the front U/J.
My method is to drop rear end of prop, let it dangle. This opens up the top of the front U/J, so you can access with a 3/8" drive 9/19"AF socket ..... after you have turned prop to optimum position, and set the hand brake. Its probably best if to remove the panel between the seats, so you can see what you are doing. After removing that nut, release handbrake, turn prop so you can turn prop, get next nut into optimum postion, etc.
Letting the prop dangle is essential.
You can also buy a special (thin-wall) tool to do this job. Probably about £15.
Just pray that your nuts are not 3/8"BSF.
602