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Has anyone here installed a Speed Density (pre 89) EFI on their early Mustang... then later converted it Mass Air Flow? Complete 1989-1993 5.0 HOs are hard to find (within my budget) but '87 and '88 Crown Vics are everywhere and pretty cheap.
 

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Here's the best article I've found to do the conversion. BTW, you won't be able to use a non-HO EFI on your vintage shortblock, because the firing order is different. You'll need at least an HO computer. Of course, if you're going to do the MAFF conversion, you'll get a different computer anyway.
 

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Firing order is EASILY changeable, you can run any firing order computer on your engine, HO or non-HO. But if your going to put a late model engine in, it BETTER be the HO or your putting a 135 hp boat anchor in your car (unless you plan on aftermarket intake/heads/headers/cam).
 
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