I don't see the Ghia listed in Prepared, although it should fall under one of the "Volkswagen NOC" listings. The problem is that your 1915cc engine doesn't fit in any Prepared class except X/P. Other options are D or E Mod. It might fit somewhere in SM.
Ah, good to know, although given those choices, and the competition already in and around them, I guess I'll be screwed for points.