really cool 70 Z28..simply the best.

[ORIGLS6]

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I will have to look. It might be buried in undercoat.

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The one and only black printed filter I've seen had only the AC logo, "Full Flow" to the left and "Type PF 25" to the right. No stripes above and below and none of this text on the reverse side.
"THE EFFICIENCY AND CAPACITY OF THIS NEW
OIL FILTER WITH ACRON FILTERING MATERIAL
AND UNIQUE “W” FOLD EXCEEDS THAT OF THE
LONGER PF-11 OR PF-29 IT REPLACES

TIGHTEN ONE TURN AFTER CONTACTING GASKET
CHECK FOR LEAKS"

I was told by a reliable source (who you know) that it was on an extremely low-mile L78 engine from a '70 Camaro. I've seen the filter and am convinced it's legit.