Are you folks still in the UK? It helps to know. My wife and I are ex-pats, originally from Leyland, Lancs. We've been in the US since 1968 and are now retired and living in Anacortes, Washington State (top LH corner).
You can probably identify year of manufacture on Ford's website, but a photo of the front end, would trigger a lot of responses on here.
Another possibility is to look at the date molded into the tail-light lenses. Back then, they often had the date of manufacture included in the mold that the lenses were made from.
"Mini Turiste" would suggest it was originally for the French market. I'm not sure about the "3000" moniker. The only engine from Ford US in that time frame that would qualify was a 200 cubic-inch in-line 6 cylinder. I had a '68 Falcon with that anemic piece of junk. 77 horsepower from 3.3 litres? Maybe the UK Zodiac motor had been substituted.
From the time I worked for Norton Motorcycles, I remember an Econoline that Player's Cigarettes used as a publicity/hospitality rig at race meetings. The original engine had been replaced by a Holman & Moody racing motor that developed somewhere around 700 horsepower. Needless to say it didn't live up to the "Econo" part of its name, but it could blow away any high performance car on the British roads.
Keep posting and the best of luck with your Econoline.