I did the same on my 66 B-Cuda. Red led 1157 tails/stop, 1156 tails, white backup 1156 (i think). All internal bulbs are led. My dash bulbs are led, but I have to pull it again to redo the polarity on some. My flasher is an electonic flasher.
Just the front parking/turn sigs are not led yet. I am going to have to solder in some resisters for them. At present if I install led's in front, they hyper flash, but only on the front. Still looking for a license plate bulb.
Got the led's on ebay, and amazon.
Dave