I thought I would update this thread with known history on my sud 'MNJ11P' now I have contacted the DVLA, heard back from them and sent letters to all the previous owners.....
I know now that the car was bought new from :
Anca Garage, 187 Findon Road, Worthing, Sussex, BN14 0EP!
To a Mr. John Shepherd on 8/3/1976 who then give it to his wife Mrs Alice Sheperd who kept the car until her death in 1988, the car then moved to oxford and then to cambridge with its 4th owner who did some recomissioning work, the 4th owner called me as he got my letter! The car was then sold to a trader and then to 3 different US airmen at the US airbases near where I used to live in suffolk, the 3rd airman sold it to the suffolk village garage in 1995 who stored it & where I bought it from in 2006.
I have a load of old paperwork now as a family member of the garage in suffolk found a large quantity of it relating to the car, I have most of the old mot's etc. Interesting to see that when the 2nd owner died the car was 12 years old and the mileage on the mot certificate shows 17k !!
If anyone is close to worthing and knows anything about 'anca garage', if it is still there or what is there now etc. please join the thread or send me a pm etc. as I am interested in gaining more information.