info Isuzu engine in 1981 Jeep cj7

Hi ,

Since december last I am the prouwd owner of a Jeep cj7 with an Isuzu diesel engine. I learned Jeep used Isuzu and Renault diesel engines for a short period, especially for France and Spain export.
Technical info on cj7 is widely availabel, however I can not get any information of the Isuzu engine. I heard is also was used in the early Troopers (were the built already in 1981?)

Can anyone tell me where to get engine data (specifications, maintannence, overhaul)?

Regards, Bert