Speed Density to MAF on '88 Mercury 302

I am looking to finally get going on one of my projects, which is to take one of the '88 5.0L in one of my Grand Marquis' and convert it over to MAF so I can benefit from changing other things.  I would prefer to go the fuel injection route vs. changing the car over to a carb.  The issue that I am running into is that there are so many different ECU part numbers and MAF part numbers that I don't want to end up buying the wrong combination.  I know there are kits out there but I am trying to do this on a low budget.  I plan on making up my own harnesses from parts I have from other Grand Marquis that I parted out.  

Does anyone know which ECUs go best with which MAFs?  Is changing the firing order from the grand marquis over to the HO mustang any harder than the obvious electrical changes?  

I want to know why you'd want to limit yourself with a MAF?

I'd do a standalone ECU, MegaSquirt, FAST, EMS Pro, etc.  Speed density is way more flexible if you ever want to step up the horsepower.  
-
The Silver Buick- '77 Skylark coupe w/ a Fuel Injected Buick 455&TKO-600, '72 Centurion Conv't - 455w/TH400, '67 T-bird 4Dr (suicide) w/428&C6. '69 Firebird replaced!

http://www.bangshift.com/forum/index.php?topic=6189.0

I'd look at these links for info:

http://www.coolcats.net/tech/advanced/ho_conversion.html

http://www.coolcats.net/tech/advanced/massair.html  
--------------------------------
460_BBF_Turbo-in-CC (formerly Dr511scj) "This guy has no life other than posting endlessly on carcraft.com." -- Car Craft, July 2005
-------
October 1, 2003: " I'm thinking a couple of...turbos, blowing through an old Powerstroke intercooler...on a Super Cobra Jet-head 460 would be mad cheap and make sick power."
-------
"I have no problem with your...talking to several versions of yourself...or pointing out our failure to do a turbo story ...." --Douglas "CC/Rambler" Glad