I used LED's too in my 65 Dart dash. They look great. The original ones are a bit yellowish, so these look modern with a white/blue tint, and more importantly they should last almost forever and less heat and current draw. I put them in when I was refurbing the dash. They are a pain to change otherwise. Don't remember the PN, I just used the bulb#'s in the back of the owner's manual and ordered all the LED bulb types I could find on ebay. Takes a while to ship from Hong Kong, but much cheaper than at auto parts stores.
The stop and turn LED bulbs (1156 & 1157) are not as bright as incandescent. I use LED's there only when I have multiple bulbs, like my Newport's rear. I figure the LED's will give at least some light if the regular ones fail.
