Finding an Allegheny bus on a Callowhill route was not something that I was expecting.
Apperently I found out that #8321 was swapped with #8135 because #8135 broke down.
So when I saw that #8321 was on the 42, I changed my plans and went after it.
And the driver was hauling heading into Upper Darby.
Enjoy the vid

Chapters:

0:00 Intro
1:01 SEPTA 2009 New Flyer DE41LF #8321 coming up Spruce St
1:17 Spruce St
3:58 Marshall Rd
10:26 Sherbrook Blvd
11:16 Wycombe Loop
11:29 Wycombe Loop (Last Stop)
11:42 Outro