New instrument cluster

There are two types of replacement "electronic" regulators.

The original supplies a regulated "5v" to the sensor and hot-wire gauge series circuits, which respond very slowwwwwly, by pulsing on and off at a duty cycle that feedding 12v on and off equals an average of 5v.
This is why it takes time for the gauges to fall on shutoff, as they follow temperature.
If you buy an "electronic" replacement, there are 2 modes.
Switched on/off timing, as the original, which is a savings in power, but the switching creates a discontinuous current event pulse "static" on weak AM reception, which is why that weird capacitor has to be plugged into the one weird extra wide slot on the Inst cluster.
The other method is a continuous analog 5 volt regulator where a superb stable 5 v goes to the sensor/meter circuit and 7 volts are wasted as heat... BUT only as much current as the meters are using on their 5 v.
Which is virtually nothing.
I did the solid state thing on my 71 Swinger in 1984 because the on-off action STILL created noise on weak FM signals even though Iput ind put multiple bypass capacitors.