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Discussion Starter #1
I have a 1985 5.0 Foxbody.
I recently installed a 6AL MSD Ignition on it. Can I run the Stock Duraspark Distributor or do I have to upgrade it?
 

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Discussion Starter #3
Thanks. I’ll try plugging the vacuum advance. The engines timing seems to be off causing it to run really rich!
 

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Timing being out is unlikely to be the cause of running really rich .
 

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A partially blocked cat / muffler / exhaust is something else that can cause running rich
 

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If I remember correctly the Durasparks had a issue with MSD boxes and it seem the advance weights springs under the cap needed changed to stiffer to compensate for the multiple spark discharge.

Let me try and research that and I will post back.
 

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Discussion Starter #9
A partially blocked cat / muffler / exhaust is something else that can cause running rich
Just installed BBK Longtubesv and bolt on Outlaw 44’s . Sounds badass!
Maybe I need a victor intake or a high performance mechanical fuel pump. I’m running GT 40 heads with a cheap assault intake and a Holly Quick Fuel 650 Street Brawler
 
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