Hi Ray,
the throttle linkage on diesels can be tricky as you're going onto a guvnor arm. You may have to fabricate a bracket to hold the outer cable. Would you believe the one on my bike has been secured by it being held at the oil filler point

On my bike the lever is at the back of the engine and is not easy to get at

I'm hoping the cable doesn't break on me on the way to Germany next week that's for sure
Fuel cut off is usually a small button pull or lever thereabouts on the block. You might be lucky and have a place to fit a solenoid coil to switch fuel on and off electrically.
You're pretty local to me and I'm free anytime for the next week and a half. If you want a second opinion send me a time and place and I'll pop over to have a look.
Stuart