This is a great find! Its a Rare White Lighting Chase 1955 Chevrolet Nomad form the Johnny Lightning, The Fabulous Motorama series.

It's a hard to find piece for several reasons: First, they only made the  Motorama series for one release which was 20+ years ago in 2002. Second, this is a White Lightning Chase version of the only Nomad in the series. Note the pictures don't do this color justice, as the blister plastic has discolored over time, the color is beautiful!

Top that off with the fact that it's a Nomad and you have one very collectible, sought after car in a very unique color (1:64 Scale)