That's a awesome guide! I started following another one a while back, but I couldn't find those covers anywhere.
This makes it look so simple, I may have to pick up some LEDs, now I just need to get the courage or somebody else to do my cluster haha.
PS: I believe 74s are also referred to as T5 in terms of LEDs because there are a few other similar bulbs that are essentially the same just different wattage's, just like T10 with 168, 194, and all those.
*EDIT: Just ordered a pair of white bulbs, should see them between the 24th and 26th, I'll post them here after!