maok Posted October 10, 2016 Report Share Posted October 10, 2016 (edited) Has anyone done this with MSD 5520 ignition box on a 12volt positive ground setup. What I was thinking is that; Main power (heavy red) is grounded Main ground (heavy black)goes to -ve power from battery. Small red to switched ground. And Orange to +ve of coil Black to -ve of coil White to Distributor points. Would the above setup work without any issues? Edited October 10, 2016 by maok spelling error Quote Link to comment Share on other sites More sharing options...
maok Posted October 12, 2016 Author Report Share Posted October 12, 2016 Any takers? Quote Link to comment Share on other sites More sharing options...
chopt50wgn Posted October 12, 2016 Report Share Posted October 12, 2016 I've run MSD 6A boxes in both of my cars. I don't think any of them were made for positive grounds. You may be asking for lots of smoke and possibly fire if you do this. I would talk with MSD before you try this. Quote Link to comment Share on other sites More sharing options...
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