Yep we got pics and part numbers.
Stamped into gear: WAB 4210 F
Stamped into pinion: 4610 H
Written on Box: WAB 4209 E ( gear set 5.14 ratio )
My reference is a google book page for the book "FOOORRD PERFORMANCE GUIDE" and on page 94 there's the following:
WAB 4209 E
60-63 Differential Gear and Pinion Set
5.14 to 1 (352 and 390 engines)
The fellow who owned these is long gone and am told back in the day he liked things that ran really fast. The photo of the gears had bad lighting and I'll redo it after lunch time...