67/68/69 cuda dilemma

The Dorman replacement Hyundai Tiburon overflow bottle setup with a NOS hyundai Tiburon mounting bracket mounted to a 1" piece of square tube.

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That looks killer. Are those Hyundai overflow bottle a recovery-style tank, or just a catch can? Also, does it have an attachment point at the top, or just the mount bracket at the bottom? Thanks!