I got in and looked at the vents and doors. All of the metal looks good in them. A little rust encapsulator should do the job. I will rebuild the vent doors and paint them so they will last another 50 years. After seeing the ones in the older truck remains that were dinintegrated I was worried. I cleaned all of the sand and twigs and old cloth out of the cowl panel too. Still amazed they are in good shape!