1965 Seat Belts???

[collins10672]

as i stated earlier in the thread i have a flint michigan built 66 cab and it has the plugs,but i have not taken them out to see if the nuts are installed.someone else earlier in the thread speculated that only the very late and last built 1966 trucks were equipped with these and maybe that was the case since they are extremely rare to find and considering i have owned about 5 66's and this is the only one i have owned like this.i have had several other friends with 66's through the years and none of their trucks had the shoulder harness plugs either so this is something very rare.