Modern Headlights
In 2004, at Dan's recommendation, I installed P3496 bulbs in place of the hard to get 1034 for the '67 Barracuda's tail/brake/turn lamps. For the front I've stayed with the hard to find, but correct looking opaque yellow coated 1034A. I've been pretty happy with this combo and seemed to work fine with the flasher control. (Pretty happy defined as generally looking period correct while providing correct light in front and slightly brighter rear lights. The latter being important for being 'seen' in built up areas where almost all the other vehicles are now using brighter lights than 30+ years ago.)