Yes,* many* thanks to Steve & Diana!
Bruce Laumeister, the manager of the Elec-Trak project at GE "back then", arrived from Vermont and had some very fine artist's renditions of proposed GE electric cars from about 1969, before they began to make the tractors. One of the models was a "dune buggy" version with open sides and a "totally cool" styling. He talked about driving the prototype "Delta" electric car around at night, since it was a "secret" project. While the Delta prototype was somewhat box-ish (for ease of manufacturing the prototype), the drawings showed models that would be considered up-to-date today.
He also explained how GE had a massive labor strike just when they were starting up Elec-Trak production. The resulting lose of momentum was a problem that just wouldn't go away... He felt that a Lithium-Ion version of the Elec-Trak could be a real winner today.
Larry Chace, Ithaca, NY I-5 and E15