I want to put Silverstar 880's in my passing lights but they are a straight where the 881's are angled.
Will they fit safely?

 

If you search for bulbs with a PGJ13 base , they are right angle setups.
The 880 is a PG13 straight base setup.
You "might" have room with the PG13, the PGJ13 "will" fit properly.
The 881,886, 889, 894, 896, 898 have the same base PGJ13, different wattage. These are single filament bulbs and use as fog light bulbs.
You can go to 37 watt with no problems , stock is 27 watt I think.
The 896 bulb is 37.5 watt for example.
Many good choices out there.
Mick