Reverse Belly Tank Design

[kiwi belly tank]

My partner and I just bought an uncompleted Lakester project. It's  a turned around 19' Belly tank with frame , steering and aluminum hand made canopy already installed. It will be a solid chassis, VW powered. I can't post pictures from my phone, but the shape is similar to the first post in this thread. My question is, would extending the tail piece to a longer taper and thus hopefully making a  bit less drag, would that help?

Don't over think it Britt, it's a good lookin slippery bitch just like it is.
  Sid.