ok here is a size comparison between a ford Australia barra 4.0L six and that well know other ford motor - windsor V8.
very tall engine with the overhead cams and VVT stuff on the top
i know of NO conversions into the small engine bay falcons ie 60 to 66.in australia
there are a few into the wider engine bay 70 onwards falcons.
here is the dimensions for the australian ford 250 (and late australian 200-same blocks just differnt stroke and rods to the aust 250) from an australian industrial engine catalogue:
and the Australian - 188/221ci.