Carquest and Napa are Wix. Same assembly line different paint. I don't use Fram! I sell 'em. Most after market remote filter adapters use the Ford application Wix# 51515, Napa Gold# 1515, Carquest# 85515, & AC Delco# PFL1A.
The most common Chevy 6 & 8 filters are SHORT Wix# 51069, Napa Gold# 1069, Carquest# 85069 & AcDelco# PF25.
Heavy Duty or Long Wix# 51061, Napa Gold# 1061, CarQuest# 85061, & Ac Delco# PF35
These are the later 6s and most small blocks there are exceptions.
