I think there is more to that one than meets the eye. It has the typical SA reflectors on the front, and they tend to butcher engines in over there - looking at some of the pipes in the engine compartment, it looks like its had a water cooled of some description in there which might explain the newer front as often they literally cut a hole in the front panel for the radiator. I conclude its deffo a SA van - not sure why they are going with a 72, I assumed its rolling tax as I agree - its got a lot of attributes of a later than 72 van.
If you get it cheap you’ll get your money back even if you sell it for spares after a couple of yours of fun , you never know you might fall in love with it and you’ll keep it, stop faffing man and buy the thing
If you PM me the reg, I can tell you any number plate thats ever been on it.... I can also do the same from VINs...