My IJP female is fine in a Neo 4x2x2. The mate is in an arboreal 2x2x2 neo, and hardly ever climbs. I have 2 8' Coastals that are content to be in their separate 4x2x2 neos, never climbing, as does the JCP female who is also about 8'. The 7 foot male JCP in in a Cages by Design 4x4x2 and sits at the top because that's where the ceramic heat lamp is. When he's hungry, he hangs down about 2' and waits for food.
They don't seem to care about height, and in the wild are found in both places.
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1.1 Blackheaded pythons
1.0 Woma
2.1 Aussie Olives
1.1 Timors
1.1 Savu
1.1 Juvie Bloods
1.1 Juvie Balls
1.1 IJ Carpets
1.1 Coastal Carpets
1.2 Macklotts
1.1 Papuan Olives
1.0 Jungle Carpet
2.2 Scrubs (on breeding loan)
0.1 Jungle/Diamond cross
0.1 child, CB
0.1 wife, WC