I can tell you part of the numbers. The first 5 digits are the serial number. 804 is the code for the gear train. It is also the code for a slow speed rear end. 801 would be the regular speed. The 18 on the spec number tells me it is a Super 88 built before the 57 models ere introduced which had some changes. The other 4 numbers indicate engine gas or diesel front axle and other options. Send me a PM with a phone number would you please. Thanks. John