I modified a pickup unit to exactly duplicate the original, GM knew what worked, and no doubt had a reason to orient it as they did .... I also used the sock, any problems that occur won't be the screens fault
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics