It was called the "THUNDER BUG" another feature was that the motor mounted on a metal plate like the "FIRE BABY" from American Junior did. I think that Joy products bought up the metal plates from Pactra after they acquired "Jim" Walkers' company. We currently make these Joy Product kits:
PEE WEE PUP (cl)
STUNT RUNT (cl)
SUPER STUNT RUNT (cl)
NOMAD (ff)
Larry