68 dart shifter location

Sorry, I can't help you with the date coding but I'm sure somebody else can, if not here, then in the engine section. BUT!!! After zooming in on your first I noticed that you don't seem to have a rubber boot where the torque shaft goes through the floor. It looks more like a metal cone shaped like a rubber boot. Upon close inspection it also looks like there's a plastic bushing where the torque shaft pivots in the metal boot. You might be OK if what I see is actually there but as I zoom into the pic it looses some clarity!!

GooD LucK,
treblig