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Adapting Open Vehicle Monitoring System for a new vehicle

I’m looking for a solution very similar to the OVMS for a custom vehicle build, how possible is it to take a default configuration and modify?

For example change the CAN messages it interprets for different stats, imagery etc.

Hi,

This is possible, knowledge of c++ and CAN will be required. I would recommend looking at the OVMS developer web page: Developers | Open Vehicles

There are links there to a developer guide and some info on getting started adding a vehicle. Copying and adapting an existing vehicle integration will probably be easiest, e.g here is the vehicle integration for Leaf: