How does this ignition timing work

[Puddin]

Found this crane module under my dash
some type of ignition timing

Does anyone know how this works with my distributor ?
Does it supply power to it ?
How does it adjust timing ?

New car to me just trying to figure what I have

 

[ELCAM]

Looks like a aftermarket distributor (could be optical or magnetic triggered) the box is basically the same as the ignition module in the factory HEI just a lot stronger.

I do not think it adjusts the timing since it still has the vacuum can. It does have a rev limiter in it likely changed with jumpers or a row of micro switches.

I think that's like 1990s technology.

 

[Puddin]

Looks like a aftermarket distributor (could be optical or magnetic triggered) the box is basically the same as the ignition module in the factory HEI just a lot stronger.

I do not think it adjusts the timing since it still has the vacuum can. It does have a rev limiter in it likely changed with jumpers or a row of micro switches.

I think that's like 1990s technology.

So that box provides the spark to the Hei ? Based on the feed back from the Hei ?