Oh....ok....i saw your other thread first.
7 at the end means two filaments.
6 at the end means one filament.
I run 3157's in the front signals.
You CAN run 906's in the corner bulb, but a buddy of mine put very hot burning bright 906's there and it started melting the corner lamp.
While at autolumination, DEFINATELY pickup some (Super White)Xenon bulbs from them. I LOVE THEM in my dome light...superbright man...you'll love them. Here's a pic ripped from their site: