The more chunky rectangular shaped filter housing takes the longer filter and the cylindrical shaped filter housing the short one.

Both the Corsair and this early powertorque Mustang should have the cylindrical housing.

What I don't get with the early PT Mustang its why they got the lower tier cylinder shaped one when Mustangs before and after got the higher tier rectangle version.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!