[aerohead]

Hucho mentions half-bodies and wing sections as the 'ideal' forms for low drag.
*Wings require dimensions which would be hard to pull off in a passenger car.Toyota's Ra-Ra is the only commercial example I've seen.
*The half-bodies,Jaray's,Reid's,Heald's,Schl'o'rwagen's,Sola rWorld GT,Cambridge University's CUER,etc. have the 'BUG' nose which is ideal for sub-transonic flow.In plan view it's essentially a semi-circle.Hucho eludes to them in his section on commercial vehicles when he discusses the 'bulbous' nose and it's superior crosswind performance.It's what I chose for the 'Template.'
PS Short of wing sections,only the half-body has the proper boat-tailing which allows full pressure recovery and entire elimination of the wake,the key to really low-drag streamlining.