Confirming the exact year is critical as these chassis harnesses are not interchangeable model year-to-model year. Get only the correct harness for your model year to assure that all switches, gauges etc will work and be plug n play.
A first glance this appears to be a 1972 or 1973 (clearly not a 1970-71), but its not possible to confirm without stretching it out and looking at every branch. There is at least one non-factory connector (circled), laying near the fuse panel in the photo.
My chassis ID guide is here if it helps:
https://bowlsby.net/914/WiringHarnesses/doc...nessIDGuide.pdfLots of unknowns with an original harness even if it has been on the shelf for awhile - hardened wires, corrosion etc. Even the best of them will need a thorough cleaning, rewrapping and likely localized repairs to some extent, which should be reflected in the price. A restoration is easily 2-3 full days work + materials.
As Mepstein mentioned, a new harness is $3,500.+ from Restoration Design and really not comparable in quality to a repaired existing harness.
GLWTS.