Well done Spaceman ! yes i knew of this van for years, meeting alan at Newark, and giving him some spares , fine van , and yes the old perkins 4108 is a superb engine if maintained, oil changes filters, clear cooling system ,in the commers or dodge version will give 40 to 45 mpg and with overdrive and with the high ratio diff will see 65 70 mph, sadly a lot of gpo deisels had a hard life and worn out when sold to the public ,even then were driven into the ground, overheated and put to pasture, real sick puppies, so to survive all this is rare ,
s.arnatt