Nice
that is a pretty early truck. It has alot of lights on it (roof and fenders) that are not original. Also, someone has cut off half of the original air filter intake system attatched a hose to the opposite end and converted it from the original style air filter to the 2.25 litre version. It looks like they had to relocate the voltage regulator to do that.
There seems to also be an added fuse block on the drivers side. Did you inherit a muffler looking thingy with the truck? That would have been the original air filter housing. Looks like a nice truck though. Very clean original paint! I wish someone would leave me a truck that nice. Of course, its always better when they are still around to enjoy it with you.
Here are the details from the lrfaq for your truck:
D 20 34300021 31 Mar 1966 21 Apr 1966 Light Green Rover, Chicago
1968 Land Rover "Park Ranger" camper **SOLD**
1967 109 **SOLD**
NADA Dormobile #601 **SOLD**
1965 IIA 88 2.5NA Diesel
1963 Mercedes 300se
1975 Volvo C303
KJ6AQK