Ok, I did this mod today with some blue led's and it looks awesome. I did get curious tho with some of the other bulbs under there. I snapped a few pics (sorry a couple are blurry) and the ones circled in red are the turn signal bulbs (also not pictured are cruise and high beam indicators). They look like 74 bulbs, but from Sylvania's bulb replacement guide, they are PC118's? I didn't try replacing them, but if someone wanted to shed some light (no pun intended) on this, it would be appreciated.
The large one in the last pic is the inverted 194 for comparison.