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Re: Carbed LS swap Backfire
I don't know that ECM very well but there might well be cranking spark tables separate from the RPM based table.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought
1969 Pontiac 2+2 427/390 4-speed Coupe
1969 Pontiac 2+2 427/390 4-speed Convertible
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