I am no expert on these vehicles. I would be curious if it was rebuilt as an M35A3 or new production. I am really jealous, looks like you have a really good truck.
All A3's are rebuilt from A2's. The goverment turned over three A2's for the base of parts and got two A3's in return. Basically AM General cherry picked all the best parts and made trucks out of them, then used the other parts for rebuilt spares or sold them as scrap.
There is a really good report out there on the cost effectiveness of the project. It determined three interesting things if I recall correctly. 1. The trucks turned in were in far better shape than expected and they really should not have turned in three for two. 2. This bad swap drove the true price upwards needlessly. 3. They recommended the military drive a harder bargain next time.
My truck has 10/98 rebuilt dates on the axles and wheels. Thus it was built in the 1999 model year. So I bought a ten year old truck for 10% of its new cost. Thats quite a deal in anyone's book.
All A3's are built to the same 1993 specs, so if you want to register it and call it something newer you better be ready when they stick you with emmissions tests your truck cannot pass.
A2 driver's are usually spared a lot of the misery because they have 1960's and 70's build dates.