Who cares if a 65mm will fit,
the TB is not a bottleneck.
Until you get over 200HP
the optimized TB flows enough air for a NA Zetec.
The larger TB is better for FI,
as it handles the pressure better.
The difference of 5mm on a NA car will not be noticable.
Get a ported intake manifold instead.

Frank McCoy aka Mod-deth aka Mid Life Crisis aka SVT Doood aka mcgainer is a SCAM ARTIST Pre98 Zetec - Some Mods