1970, 71 & 72 Wagons are very similar, as you can see in the picture I took at the Spring 2001 Carlisle, PA swap meet. During the years of 70 to 72, Chevelle wagons were only available in 4 door versions.In 1970 the wagon along with it's cousin Chevelle, received a body design change.The majority stayed the same as 68 & 69 with exception the the tail lights, head lights, grill and dash board being some of the biggest differences.uring the years of 70 to 72, Chevelle wagons were only available in 4 door versions. In 1970 the wagon along with it's cousin Chevelle, received a body design change. The majority stayed the same as 68 & 69 with exception the the tail lights, head lights, grill and dash board being some of the biggest differences.