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Old 11-11-2017, 01:11 PM   #1 (permalink)
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79 LA360 swap to M37 wiring questions

I am in the final stages of a "quick" swap of a 79 360 from a Dodge W300 into a 53 Dodge M37, what was supposed to be easy turned into all summer due mostly to procrastination and the nothing is ever easy factor. Im at the wiring stage, not a wiring master by any means and am wondering what the most minimal wiring setup is?

I have just started googling wiring diagrams but not sure im finding the right ones. The distributor is a 2 wire black red and my hope is to be able to use it but after that im open to ideas.

Im trying to do the dizzy, internal ballast coil and alternator with voltage regulator to eliminate an external ballast and regulator.

So the questions, is the dizzy red black power and ground or ? can I use a internal ballast coil or is there some reason not to? does Dodge make a 1 wire internally regulated alternator like Chevy or do I need to mod some brackets and run a delco?

Thanks for any advise
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Old 11-11-2017, 05:31 PM   #2 (permalink)
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You have an electronic ignition distributor, it's easy to Google basic wiring diagrams for Mopar ignition. As for the alternator, the stock Mopar alternator and regulator will work fine and has the bonus of being able to easily swap out the regulator if it goes bad instead of swapping the whole alternator.
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Old 11-12-2017, 05:46 PM   #3 (permalink)
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Thanks for the info, im thinking ill base the alternator choice on whether or not the one i have works and replacement costs, I will spend some more google time on the diagrams, the ones i looked at all had external ballast for the coil but id like to do away with that if its not necessary, just dont know enough about wiring
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Old 11-13-2017, 11:16 AM   #4 (permalink)
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You can use a GM HEI module to run that mopar 2 wire distributor. That allows you to use straight 12 volt and a modern oil-less coil. You just need to mount the module to a heat sink so it will live. There is a company that makes a mount/heat sink that screws to the distributor base to make packaging easy, but I can't remember the name.
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Old 11-13-2017, 03:35 PM   #5 (permalink)
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Thanks for the info ill check into it
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Old 11-16-2017, 03:38 PM   #6 (permalink)
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Originally Posted by crashnzuk View Post
You can use a GM HEI module to run that mopar 2 wire distributor. That allows you to use straight 12 volt and a modern oil-less coil. You just need to mount the module to a heat sink so it will live. There is a company that makes a mount/heat sink that screws to the distributor base to make packaging easy, but I can't remember the name.
Travis..
I have to agree - I have the HEI module swap in my Ramcharger and love the simplicity. I've seen the HEI module heatsink that attaches to the underside of the mopar distributor (they are slick) but I just have mine mounted flush to an aluminum plate on the firewall. Power is provided by the 12 volt side of the ballast resistor wiring coming from the ignition switch (could be key switch or a simple toggle, whatever) and you'll need a separate full power coil like what's found in some later GMs and Fords.

Link to HEI module mount and coil recommendation: Mopar HEI Conversion

Link to instructions: How To Convert A Ford Or Chrysler Ignition To GM HEI - Car Craft - Hot Rod Network
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Old 11-16-2017, 05:32 PM   #7 (permalink)
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Thanks for the links, that is really slick ill be ordering that up this weekend, anything I can do to simplify this project is a bonus right now
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Old 11-17-2017, 06:10 PM   #8 (permalink)
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So ive found several distributors on ebay that are for small block Chrysler with GM HEI for $60 to $80, seems pretty cheap considering the conversion plate, HEI and coil are going to be at least that.
Anyone have any experience with any of these?

one example
https://www.ebay.com/itm/318-360-SB-...dVpm6o&vxp=mtr
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Old 11-17-2017, 07:37 PM   #9 (permalink)
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Originally Posted by nhjohnny1 View Post
So ive found several distributors on ebay that are for small block Chrysler with GM HEI for $60 to $80, seems pretty cheap considering the conversion plate, HEI and coil are going to be at least that.
Anyone have any experience with any of these?

one example
https://www.ebay.com/itm/318-360-SB-...dVpm6o&vxp=mtr
Only problem is firewall clearance - the GM HEI distributor is a lot larger around than the chrysler electronic distributor and you may have clearance issues between a GM HEI distributor cap and the M37 firewall. Check it out to see if you have the room and then decide. I personally like the GM HEI distributor conversions too - I have one in my AMC 304-powered Scrambler.
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Old 11-25-2017, 05:52 PM   #10 (permalink)
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I grabbed an ebay HEI complete distributor with remote coil to keep the cap small, almost to cheap to be trusted so we will see, should be here monday.
Been reading and it looks like a 3 wire chevy is a better setup than the one wire deal, now need to look into Dodge alternator setups to see if they are better/cheaper than a GM 12SI
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Old 11-25-2017, 06:07 PM   #11 (permalink)
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Looking like Delco 12SI is the way to go
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Old 11-27-2017, 09:15 AM   #12 (permalink)
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The one thing that I have heard about the GM HEI module is to use real heat transfer paste between it and the heatsink you mount it to. I think most modules come with dielectric grease (if anything) which is not the same thing. Find a Radio Shack (are they still around??) or electronics store of some sort.
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