I have a reefer unit with a 4 cylinder diesel engine on it. I believe it to be a Isuzu but I would like to know for sure the model and specs. The only numbers I found on it were stamped on a machined pad at the bottom of the block just above the pain rail and below the IP. The #: 146557. Hopefully doing a conversion on my 98 Ranger. Can anyone help me with this? thanks ron......................