brackets to carry a couple of spare leaf springs, brackets for fuel and water cans, maybe some secure waterproof boxes for a few electrical items and tools, a puncture repair kit (including stirrup pump) and a spare tube or two, a spare wheel complete and bare tyre, i'd also squeeze a halfshaft in being as i have a Rover axle under the rear, a box of hub/brake and clutch seals along with brake fluid and a litre or two of ep90 and a gallon of oil to top the engine up, a winch possibly wouldn't go amiss but i doubt you'd really need one unless your intentions were to really get off the beaten track nowadays...
pack not too much clothing, a couple of blankets/dossbags, mosquito nets maybe along with possibly a couple of collapsable beds/hammocks and a canvas for shelter, think carefully about cooking arrangements, a coleman petrol stove is probably the best
but the main thing really isn't to travel alone when using a 50 year old motor, travel in a convoy of at least two to have assistance to hand should things breakdown badly in the middle of nowhere
back in the fifties a pistol was also a viable option :lol:
today i guess a satellite phone and an aa card is probably your most valuable asset
p.s.
the furthest i've ever been is the Isle of Wight