Due to finding more info and my general dumbness

I am reposting (previous post has been deleted)
Here it is: 1986 M1031
1. 1GBHD34J7GF431779
2. NG1LZA
3. 2320011335368
4. Vehicle was bought from a private party and not from the Army. I was told vehicle had belonged to the SC National Guard.
5. Vehicle was repainted by said party, so no bumper #'s. There is a round plate on the front with "04". You can see it in the avatar. Not sure if this is original.
Here is where it gets interesting:
The truck was made in 07/86. In 06/92 the truck was converted into a M1028A1 (NSN: 2320011580820) at "TEAD" which is apparently Tooele Army Depot in Utah. The modification data plate has the "Mod Work Order" as 9-230-289-50-1 and the "Mod Parts Ref" as 9-2320-289-20P/34P. Additionally, there is a tag for radiator servicing attached to the radiator overflow hose (I am not sure if this is original) The date of the servicing is 09OCT07 and the mileage is 28,190 (this does not match the odometer). The individual responsible for the servicing was a "(rank/name omitted)" I suspect this person is one of two individuals, in either A CO 143rd FSB (CT National Guard) or or F CO 186th BSB (VT National Guard). Not sure if this extra info helps. Any additional info is greatly appreciated