BillGrissom said

Cheapest is the "ready-to-run" HEI distributor by Ningbo (China), for ~$45 on ebay, by Steve White Performance and others. They also have one for big-blocks (~$60), but not for the slant six. It doesn't use a GM HEI module, but some other 4-pin module, perhaps for a Japanese engine. I have one but never installed. I might instead install an 8-pin GM HEI module under the cover. You also need an e-core coil. I bought one for $20. If you want to stay Mopar, take one from a Magnum V-8 engine (~1998-2002).

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