Grease Monkey Garage - Retro Art theme

Here's a shot of all of the components in my next board game Grease Monkey Garage.

Players will be moving shared mechanic workers around the shop to try to gather supplies in order to fix customer vehicles. In this example, the game is set up for 4 players.

Trying to give it a retro/vintage feel without overdoing it. Any suggestions on how to further the theme or did I nail it?