rear diff and carb conversion????

[(mercin')]

i was wondering what is the size of the rear diff. on my 88 grand marq. i know i might sound like a complete idiot, but i need to know? as well as whats the easiest way to convert from efi to carb? i appreciate it.

[crown vic muscle]

rear diff is 8.8

[1987cp]

Which injection system are you starting with? '83-'85 CFI or '86-'91 SEFI?

[gadget73]

Any special reason you want to go to a carb? I personally would not suggest it unless you really need to do it. I'll also admit to not liking carbs so I generally try and persuade people to keep the EFI if at all possible.

[(mercin')]

yea its EFI. i just like the simplicity of carbs, less clutter in the engine bay.

[RunUoveR]

i would never bother to convert a carb car to EFI but i wouldnt bother to take it off of my merc. its pretty nice espically if your car is a everyday kind of car

[Pesty351]

I love carb's. There not as much trouble as some people make them out to be. I found it to be pretty easy to do the swap. But then again I didn't have to fuss with the kick down. I'm with you though I hate clutter especially wires so any thing I can do to get rid of some I do.

[86VickyLX]

yea its EFI. i just like the simplicity of carbs, less clutter in the engine bay.

'83-'85 would be way easier to convert than an '86+. But if you have the '86 plus, I'd keep the EFI.

[gadget73]

Its actually about the same work to convert a CFI car as it is to do an EFI car. Despite the injector setup being different, not much else is.

[1987cp]

Back to ANSWERING THE QUESTIONS ...........

The main components of your carb swap are mostly the obvious: your favorite four-barrel (the 500cfm Edelbrock 1404 is a great option); your favorite low-RPM dual-plane intake such as an '83-'85 Mustang intake, Offy Dual Port, or the ever popular Edelbrock 2121; and an ignition system, usually consisting of a Duraspark II distributor with a gear that matches your camshaft (steel for rollercams, AutoZone gives you a choice) and either a matching DSII box or your favorite aftermarket CD ignition box. At this stage you'll also be making decisions about what emissions controls you want to retain and how to do it.

People have used several different approaches for fuel. The most radical (and what I ended up doing) is to swap in an early-model fuel tank for a '79-'82 car along with the matching pickup/sending unit and mechanical fuel pump. It's also possible to leave the electric pump in the tank but disconnected and use that as a pickup, or else to remove the pump and connect a pickup hose to what was the pressure line leaving the tank. Yet other people have chosen to retain the stock in-tank pump and use either a regulator or even a plain T fitting to return unneeded fuel via the stock return lines.