4-5-6 has been very hard to get a hold of over the last 2 yrs. Good guy, but has not returned many calls or emails. If I ever get out to Kansas City I am going to stop and shake his hand, but until then I am keeping a distance.
Noticed this link below. Has a parking brake bracket listed. Maybe gone, but they may be able to take some other pictures.
http://www.aspenautoaz.com/60-66-chevy-truck-parts.html