5.0 HO to carb conversion, 1989 Mustang - Ford Mustang Forum
 
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post #1 of 11 (permalink) Old 01-12-2008 Thread Starter
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5.0 HO to carb conversion, 1989 Mustang

Hi I need some advise on converting my 89' 5.0 HO into a carburated motor. I want to put this engine in a 83' mustang and dont want to mess with all the wiring and sensors. My questions are: Will a normal 302 intake fit a HO motor? I am guessing yes. My biggest question is how am I going to control this motor, I want to keep the roller cam! that is the biggest issue, I have a new E303 that has been sitting around for the last 4 years or so, so I would like to use it. I need a distributer that will work with a roller are there any stock distributers that will work? or only msd? Do I need a steel, cast, or bronze gear I know you are suppose to have a certain one but cant remember which? It might just be easier using msd with 6al and what dizzy? any help or suggestion on this will be very helpful Thanks P.s. could I go with Duraspark? Is there a dizzy for roller?
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post #2 of 11 (permalink) Old 01-12-2008
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You can use a distributor from an '85 Mustang GT that came with a 5-speed. The '85 GT 5-speed's were the first year to have a roller cam and the last year for carburetion. You will need to make sure your distributor has a steel gear to run with the roller cam. You could probably buy a regular distributor for a 5.0 that was carbureted and get a replacement steel gear to swap out if you had to.

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post #3 of 11 (permalink) Old 01-12-2008
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You can use a regular 84 or 85 distributor & get a ford racing catalog and they have the steel gears in them. I have a 1984 gt and I put a 1995 cobra motor in mine, I got the gear from ford and I bought a edelbrock performer intake and edelbrock 750 cfm carburetor and put on it and it worked great. The intake is just sitting in my garage now because i bought a weiand supercharger & it came with a intake. when you get the distributer knock the roll pin out & pull the gear off & mic. the shaft because i found out they had different shaft sizes so you get the right one from Ford.
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post #4 of 11 (permalink) Old 01-12-2008
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Yup, you can use a standard distributor and switch the gear. Best thing would be to get one for a 1985 model and it'd be a drop in install.

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post #5 of 11 (permalink) Old 01-13-2008 Thread Starter
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Ok guys sounds good! but which one do I need? the auto parts stores have different ones for that year, and will I need an ignition box like duraspark? or something, or is there one that I dont need anything???? I do have part of a harness from a old F-150 that has duraspark and actually I have a distributer for one too, are they the same? 1979 F-150 dizzy and duraspark ignition box 351m.

How about this one Cardone 302831?

oooops I also wanted to ask if this has the proper gear? for the roller

Last edited by EagleAutosports; 01-13-2008 at 10:27 AM. Reason: merged 3 posts
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post #6 of 11 (permalink) Old 01-13-2008
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The 351 distributor won't work. Not only would it not fit, it has an iron gear and would eat the cam.
That 302831 may not be the one you need, you probably need 302830. Both do have the right gear, it's steel and won't eat the cam. The one with the module on the side is the one for the H.O. engine and that's the one you need.

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post #7 of 11 (permalink) Old 01-13-2008 Thread Starter
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Ok great, but what do I connect to the module once I get it???? I dont have any ignition computer that has a harness that looks like that one? What computer has to be used? I may have a connector that will fit the module but it is only wiring I dont know what kind of computer this thing uses?
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post #8 of 11 (permalink) Old 01-13-2008 Thread Starter
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I have a computer and wiring for the cardone 302831 style. at least the connectors look the same . It was also off of a truck with duraspark ign.
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post #9 of 11 (permalink) Old 01-13-2008 Thread Starter
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My main idea here is to find a distributer that I can use with a roller cam, as easily, and as cheaply as I can. If I can use some parts I have lying around that will work, great! I will buy a stock dizzy. But it is starting to look like I would have to buy a distributer, a ECU, and maybe a harness that would work, I dont have any harnesses that are together that look like it would fit the module on the distributer, just in my EFI 89' mustang has a module like that, but I'm not using that kind of computer. I would also have to buy the distributer cap. By the time I got done buying and locating all this stuff wouldnt it be just as easy to buy summits sum-850303? Or Pro-66969R? For $206.95 for sum and $186.88 for the proform. What is the deal with the Proform distributer though???????? Summit says ok to use with roller cam, and Jegs and advance auto parts says NO! Installation instructions state to insatall bronze gear before installation using roller cam , anyways just asking maybe you guys can tell me more about these stock dizzy's and how to connect them Thanks guys for all the help!!!!!!
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post #10 of 11 (permalink) Old 01-13-2008 Thread Starter
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I went out and looked at the mustang this stuff is going in and it now has the duraspark box in it (however it is currently a V6 3.8) but it does have the round style plugs for the distributer. So wouldnt I want to use the duraspark style or can I?????????? I do know the firing order is different in a HO "from the cam" so would the Duraspark style work? Sorry about all the posts the trying to sum thing up. Thanks
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post #11 of 11 (permalink) Old 01-15-2008 Thread Starter
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Anyone have anymore ideas?
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