Hi there Maire,
Shallow arch cars are "low rear wheel arch" cars AFAIK
... Your 1750 which is a 1969 1750 GTV should not be a "shallow i.e. Low Rear wheel arch car"....
The change in rear wheel arch design, hapened during 1967 (rather later in year than earlier) .
I'm happy to be corrected, if I'm wrong.
Hope this helps,
(Jan 1967 1300 GT Junior, in bluette w/oxblood skai inetrior)