The upper quarter panel spears are aluminum on the '66 Barracuda also. You can use those and the 4 door ones on a convertible by cutting off the excess length on the rear of the molding. The '64-5 Barracuda uses a stainless one, but the width and contour is different and won't engage the taillight housing correctly on a '66 model. The taillight lens melting problem is usually due to people putting the wrong bulb in them. The correct upper bulb is a 1034, not an 1157. Even though they both fit and have the same candlepower, the 1157 is slightly longer and sits closer the lens. The backup light is a 1073. Interesting enough, the lower taillight bulb on the Barracuda isn't listed in the owner's manual, factory service manual, or the factory parts book!, but the stock bulb is also a 1073 according to what I find in my 32K original car. If you put a 1073 in that socket, you will probably melt the lens on long drives with the lights on. Use a shorter bulb, even if it's not as bright. The Valiant just has the upper taillight/turn signal bulb on top, a reflector in the middle, and the BU light below. Using the 1073 bulb in both the Valiant and Barracuda for the BU light isn't a problem unless you leave that light on a long time for some reason. The way to go these days is to go with LED lights for some of those locations. They run a lot cooler. If you use them for turn signals, you'll need a different flasher however, as the LED lights don't draw enough current to activate a stock flasher. You could use some correct outside mirrors for your car too, along with the correct gas cap. If you need the door moldings, I believe I have some nice ones. I also have some of the other moldings too, but, I'd have to check stock and condition, so. let me know by PM specifically which ones you want/need.