The large station wagons of the early 1970s certainly didnât have the technology of todayâs SUVs and mini-vans. These cars pretty much came with the AM radio or â if they were lucky â there might have been a cassette or 8-Track player.There may or may not have been air conditioning.hances were that the only air conditioning available was provided by rolling down the windows â by hand! However, there were two events in the 1970s that had a huge impact on the size of the decadeâs cars and on station wagons in particular. In 1972, a host of emissions specifications were introduced.