Building or buying an IVR / step down voltage buck converter for the instruments
@4spdragtop I don't guess I have any pictures of it stripped down, but yes. I usually use a Bosch voltmeter. They make one that swings from the bottom and one that swings from the top depending on what cluster you're working on. You take the ammeter guts out of the cluster, split the bosch gauge apart, and put it's guts in the cluster. You usually have to file the mounting holes to an oval as they don't align 100%. Some clusters the needle matches pretty good, on the dart I cut the factory needle off the ammeter and used a drop or two of superglue to attach it to the Bosch movement. It's not too hard to do really. If you can build a 5v regulator from scratch you can do it!
@4spdragtop I don't guess I have any pictures of it stripped down, but yes. I usually use a Bosch voltmeter. They make one that swings from the bottom and one that swings from the top depending on what cluster you're working on. You take the ammeter guts out of the cluster, split the bosch gauge apart, and put it's guts in the cluster. You usually have to file the mounting holes to an oval as they don't align 100%. Some clusters the needle matches pretty good, on the dart I cut the factory needle off the ammeter and used a drop or two of superglue to attach it to the Bosch movement. It's not too hard to do really. If you can build a 5v regulator from scratch you can do it!