Odd thing about the Mighty Mite, original procurement and parts were through the the U.S.Army Ordnance Corps, but the Marines ended up with it. Almost every part on that truck was difficult to get 40 years ago, so much so I made new stronger front hub center bolts to get around the cracking through the cotter pin holes issue. When that happens, your front wheel is about to leave the room. Holley carb parts can be found in a very old crossover book, and watch the front "hat" member under the blower, they will rust out if the Mite was forded or brought in over a beach, and they almost all were. Again, do not jack via the front differential.... Mechanics will attempt it at inspection, and so you need to be there and alert. Also be aware of the "Fording" position on the fuel filler cap..Inadvertently push down and turn and shortly you will have a vacuum form in the tank and you will stall at the most in-opportune times. Spark plugs were dear in the 1970's, I suspect there are no conversion sets made to use civilian standard plugs. Other then that and Marine mechanics who were good at cutting corners, it is an interesting vehicle.
Have a Great Day!
Sincerely,
Kyle F. McGrogan