Sorry, not been on here in a while so hopefully not too late. I use Legendary Auto Interiors for all our interiors and either Soft Seal or Metro Molded Rubber for all my weatherstripping. Hope that helps.
Rick
Thanks for sharing the Saginaw info. I have a 68 that's coming out of the garage here in the next month or so after extensive restoration work. I too upgraded my sway bars but I know I will want a tighter feel eventually. Are you going to the track at all with your car?