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1978 Ford Bronco Custom
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Discussion Starter #1
Hello everyone, im new to the site. Im in need of some help with my new project. This is is 78 bronco but with a 77 400 in it. The guy before me didnt give a lot of details unfortunately. Im just trying to get the right parts in and get this thing running. The dude before me said it needed a different distributer and fuel lines ran and it should run fine.

Could someone please help me identify what distributer I would need? Any other related advice would be also appreciated.
 

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Joisey don't smell funny
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We could use some more details, such as:
1. Have you had it running at all?
2. Does it fire?
3. Have you checked for spark?... fuel?
4. Never trust in whole what a PO tells you.
 

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1978 Ford Bronco Custom
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Discussion Starter #3
We could use some more details, such as:
1. Have you had it running at all?
2. Does it fire?
3. Have you checked for spark?... fuel?
4. Never trust in whole what a PO tells you.
No i havnt had it running yet. Past guy said he turned it over but thats as far as he got. Fuel tank is disconnected. Havnt checked spark. Tried to turn it over but just got clicks even with cables hooked up so I need a new battery.
 

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Joisey don't smell funny
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1,172 Posts
You'll need to make the fuel in the tank is good before trying to suck that stuff up to the carb. Put in a new fuel filter also. Make sure the spark plugs are in decent shape. Check all the wiring related to the ignition system. Then give it a shot and let us know what happened. Good luck.
 

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That looks like a Mallory unilite dizzy. Good product. Only thing it may not play nice with the duraspark ignition box. I’ve not ever tried mixing the two.
If that dizzy doesn’t work you can get a remanned duraspark dizzy from most any parts store as long as the PO left all the duraspark wiring inplace. If not I’d recommend a one wire HEI like this from summit racing
1978 FORD BRONCO Summit Racing Blueprinted HEI Distributors SUM-850025
I’ve had good service from the one I run and it’s price is not bad.
The problem with the remanned duraspark dizzys I’ve found is cheap chinesium pickups that burn out and the lack of quality duraspark boxes available.
Oh and get rid of that glass fuel filter and put a good fram or comparable filter on. Those glass ones leak and cause fires.

Sent from my iPhone using Tapatalk
 
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Yeah, that's a good distributor. Before I went SEFI, I was running that dizzy. The Unilite optical trigger module inside can go bad, but usually only if you deliberately try to fry it - forget to disconnect the wiring to it and started welding on the frame of the truck or something. I actually have several Unilite distributors sitting on my shelf collecting dust at this point. I'd be happy to ship one out to you for the cost of shipping if it comes down to it. That being said, it's unclear as to why it doesn't fire. The coil hookup needs to be correct, as does power to the Unilite module. It makes for a fairly reliable offroad part as it's somewhat impervious to water crossings - where a standard points dizzy would fail to trigger spark after being submerged, the Unilite will just keep going.

The attached Unilite installation manual might help.
 

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Discussion Starter #9
You'll need to make the fuel in the tank is good before trying to suck that stuff up to the carb. Put in a new fuel filter also. Make sure the spark plugs are in decent shape. Check all the wiring related to the ignition system. Then give it a shot and let us know what happened. Good luck.

Ended up going with a stock duraspark distributer, new spark plug wires, and stock ignition coil. Plus a few other small things i didnt even realize were missing. Checked all the ignition wiring. Threw a new battery in, turned it over and everything seems happy so far.

Next step is fuel. Thinking about switching to the 33 gallon. Need the sender unit, filler neck, and fuel lines. Once i get this in over the next couple weeks, i should be able to fire it up and set timing and all that.

I appreciate the advice to everyone who responded and more is always welcome.
 
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