IIRC the only numbers that are decodeable are the 99 (trim?) and 3A0 (paint?). The numbers above are the invoice number(?), some Jeep internal number, and the SSR&O number (special sales request and order number). These aren't meaningful without the original factory and/or dealer paperwork.
There should be little more about these in the '81 FSM, sp. the paint codes.
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
ECO Green: '15 FCA Jeep Cherokee KL Trailhawk