In an earlier post labelled "Cuda LED tail lights" I described which LED bulbs I used to replace the old 1157 tail lights in my 73 Cuda. This post will describe the rest of the LED swap.
For the front turn signal bulbs, I used the Sylvania Zevo 1157A's. They're very similar to the 1157 Zevo tail light LEDs, except they use amber LEDs to mimic the amber 1157 incandescent bulbs. The Zevo 1157A's put out a decent amount of light, so no worries about dim turn signal flashers.
I had a hard time finding the CEC NP flasher, so I went with the United Pacific 90652 LED flasher. This flasher comes with a polarity reverser so that you don't need to swap the polarity of the wires like you do for many other LED flashers. At first I tried installing the flasher without swapping the polarity and the turn signals didn't work. With the UP 90652, I simply snapped the polarity reverser to the bottom of the flasher and then everything worked. Easy peasy! Plus, the UP 90652 makes a clicking sound when the turn signals flash, just like the OEM flasher does. I also did not notice any additional flashes after the turn signal was cancelled. I've heard that's a problem with some flashers, but not with this one. All in all, I recommend this flasher for an LED conversion.
Almost forgot - the UP 90652 comes with a short ground wire. I simply attached it to a sheet metal screw through one of the holes in the bottom of the metal dash frame.
So here are the part numbers for all of the LED's and flasher:
1) Rear tail lights: Sylvania Zevo 1157
2) Backup lights: Sylvania Zevo 1156
3) Front turn signal lights: Sylvania Zevo 1157A
4) Turn signal flasher: United Pacific 90652
I'll probably end up trying another UP 90652 for the emergency flashers, but for now these are the basic parts you need for the conversion.