I came across another variable reluctor system. AMC. Very similar to Nissan's in concept but not so bulky. Also switched to a fancier module as it progressed.
https://www.rockauto.com/en/catalog/american+motors,1976,hornet,4.2l+258cid+l6,1004500,ignition,distributor,7108
https://www.rockauto.com/en/catalog/american+motors,1976,hornet,4.2l+258cid+l6,1004500,ignition,ignition+control+module+(icm),7172
https://www.rockauto.com/en/catalog/american+motors,1978,gremlin,4.2l+258cid+l6,1003936,ignition,distributor,7108
https://www.rockauto.com/en/catalog/american+motors,1978,gremlin,4.2l+258cid+l6,1003936,ignition,ignition+control+module+(icm),7172