Chrysler production numbers and option break downs for 70s trucks were lost to history a couple decades ago. Warehouse fire maybe. As for fair market value, those numbers are all over the place for about the last decade or so. Tin grilles of any sort more so than Machos specifically. Unless it still has the equipment id label under the hood with the macho option code, I wouldn’t pay a premium for the roll bar, stripes, one piece of trim and a set of wagon wheels.

Not a very active place but maybe a better answer here: machopowerwagon.com