Cool - so if I got 4 round lights, I could have all four of the dim rings hooked to the running lights, and then the outer pair's bright rings connected to the signals and the inner pair's bright rings connected to the brakes
... Although I guess I'd better look up the ministry of transportation restrictions...
Only problem is the "bump out" for my current lights is only 9.5 inches wide and 5 inches tall. So I'd probably need to use the 4 inch lights instead of the 7 inch ones.
I saw the rectangular ones in the other threads, but the '71 has an oval bubble rear window and I thought round taillights would look good - emphasizing the egginess!