Sequentialling (is that a word, like gocartish?), is not rocket science.
There must be a way to get the turn signals to flash sequentially without making the brake lights do that.
I have one of those Cougar boxes from '68-70, and will check it out. What I would like to do is make it use the 1157 type bulbs, and plug into those 6-position T-Bird connectors without cutting any original wires.
Oh, well, project #398.
Perhaps it could be developed at "M28 Labs"?
Paul N.