The Firebird FORMULA in my signature requires the PF47 however, I have been running the longer PF52(or aftermarket brands-see below) for many years. The PF52 is longer but, NOT LARGER around so, it fits into the same space as the PF47.
A larger around GM filter(FATTER) will not fit in my engine's filter space/area. Even though the LARGER GM filter thread and gasket would still correct, the filter is just too BIG.
For reference, I used my ol' 93 S-10 pickup w/4.3L V6. You can also use in place of the PF52(regardless of the letter designations)
FRAM - 3980
PURO - 24011
CarQuest - 85036
Mobil 1- 201
K&N - 2001