IIRC, there are three, maybe five in the gauge cluster that are T1
The bulb for the key halo is a T1
All of the rest, that I can remember are already LEDs (the T1-3/4 package) or T1-3/4 bulbs.
T3 is the size used in your tail lights, and T3-1/4 is the size used in the parking lights in the head & tail.
But I may be wrong.