In reply to Kaisl:
2.3m is a good height to enable the incorporation of a bar or some means of building side supports to the ply line to support a hang board on.
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Such 2nd hand vans are out there, but you don't often see them in a proper lwb config, usually mwb or pretend lwb.
Fiat Ducato is called super high top, Peugeot + citroen is H3,... here's a useful resource...
https://www.grs.co.uk/panel-van-dimensions
Would be good to see your finished conversion