Interesting

The parts guide is a bit misleading as it's hard to
spot any reference to oil cooler and Vitesse. But there is one, on a
page with 'illustration to follow'.
ARH 185 Engine Oil Cooler...... 3500/Vitesse
There is no further information on this item, or any other reference
to hoses for the Vitesse, or drawings of an adaptor or anything else!
There is a note on another page which reads "For use with automatic
vehicles when towing".
Out of interest, were the two VDP EFi's and Vitesse fitted with tow
hitches?