Hi 65Fastbackk,
Here your go:
1st wheel – First available in the 1968 SAI parts catalog, 1967 version with no cancel pins, the least labor intensive wheel to manufacture of the three versions. Not available when 66 GT350’s or SAI 67's cars model years were first offered for sale.
2nd wheel – Non SIA wheel.
3rd wheel - First available in the 1968 SAI part catalog, 1966 version with cancel pins, the least labor intensive wheel to manufacture of the three versions. Not available when 66 GT350’s were first offered for sale new. This is the third version in the series of three for 1966 applications.
4th wheel – Looks like wheel 1 or 3 with hub removed.
5th wheel – First available SAI wood wheel for 1966. Continuous wood, no black filler, making it the most labor intensive wheel to make when compared to other two. The second version of the SAI 1966 wood wheel, not shown, has black “boots” on spokes at rim interface.
All 1966 SAI wood wheels originally have turn signal cancellation pins.
I hope that helps.
Cory