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.
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.
correct the non ho had the 302 firing order and the ho had the 351 firing order. i'm not sure if there were and non ho efi's that had the MAF though, i think they were all speed density but i could be completely wrong
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).