Wow, lucky you Dave. We had the 1200ct model from the same year. It was our first family van in 1981/2. No heating or electric, a manual foot pump for the water, no loo. Dad put in 12v and after our first holiday in March had a heater fitted. We covered some miles in that van. From Leicester furthest North to North Yorkshire, then Wales, East Anglia and south to Dorset, Devon and Cornwall.
I hope you enjoy you van as much as we did.