I'm currently placing a raspberry pi and an AR1010 based radio chip into the housing of a blaupunkt car radio from the 60ties for my friends VW typ 3 wilson. To mount the electronic parts I printed a bunch of spacers which I created using openscad.
RadioPI hardware part 1
RadioPI - finalizing the audio module
Day 30 of 30DaysOfCreativity - RadioPI interface module
Day 28 of 30daysofcreativity - testing the radiopi software