72 340 trap door filter element size

Yep, the same filter was used on many models. I keep 5 or 6 of them on hand.
FRAM CA305 Specifications
Bottom Inside Diameter 11.020 IN
Flexible or Rigid Rigid
Height 2.770 IN
Inside Diameter 11.020 IN
Inside Diameter Top 11.016
Outer Diameter Bottom 12.810 IN
Outer Diameter Top 12.813 IN
Outside Diameter 12.813 IN