well, "expert" is questionable .... but here's what I know or at least have evidence for .... the '67 steering wheel dish has three spokes and a padded center hub (to make a larger hole in your chest in case of frontal impact!) .... I'm looking at a showroom brochure and all pics of the steering wheel have a three spoke wheel with NO interconnecting "metal bar along the bottom" .... I have a '67 with standard interior and the spokes are adorned with four "black dots" (painted) and the spokes are chromed .... in the brochure, several artist renditions of deluxe interiors are shown and from these one would surmize that the spokes have real holes and the spokes extend out to the wheel rim (horn buttons at the end of each spoke) -- all metal .... the standard wheel has plastic (over steel??) spokes underneath the horn spokes .... but the details on all of that are sketchy .... I do know that the standard interior wheel has three spokes as an intergral assembly to the rim with a three spoke (metal) insert for the horn .... So, this gave me yet another opportunity to view the Bullitt car chase sequence and in there are several chances to catch a glimpse of a '68 wheel -- unfortunately I could only see spokes that looked similar to the 67's .... so not much to comment on from that .... hope this helps ....
67GTFB