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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Resistor wire for engine swap?

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Old Aug 21, 2015 | 12:21 AM
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Resistor wire for engine swap?

Hi, putting a '73 4.9L engine in an '83 f250. Want to know if I need to use a resistor wire for coil. Using complete '73, carb, dist, coil, etc.. Any info will be helpful. Thanks...
 
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Old Aug 21, 2015 | 05:31 AM
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Yes
You will need a resistor or resistor wire while the ignition switch is in the run position.you can buy the wire with the resistor built in (dont shorten) or
You can do what i did use a ceramic resistor like for a 55 chevy or dodge used them in the 70's.just wire it in and mount.
 
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Old Aug 21, 2015 | 12:12 PM
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But, unless the 83 was a diesel a resistor wire is built in to the harness.
 
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Old Aug 21, 2015 | 12:16 PM
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The coil's are different, so where it is built in, is a different set up
 
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Old Aug 21, 2015 | 12:21 PM
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If you use the factory coil wiring there is a resistor built in. To use a separate one will require separate wiring. And there is no reason I can see to do that.
 
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Old Aug 21, 2015 | 12:26 PM
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Please excuse the Hijack...
Gary, have you checked your PM box?
 
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Old Aug 21, 2015 | 12:29 PM
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Originally Posted by xlhr8r
Hi, putting a '73 4.9L engine in an '83 f250. Want to know if I need to use a resistor wire for coil. Using complete '73, carb, dist, coil, etc.. Any info will be helpful. Thanks...
Does the 1973 use a point dist.
 
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Old Aug 21, 2015 | 12:53 PM
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Originally Posted by 1986F150six
Please excuse the Hijack...
Gary, have you checked your PM box?
Have now and have responded. Thanks! Hijack over.
 
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Old Sep 9, 2015 | 02:33 AM
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Better late than...

Hey, thanks. Just been real bz. Just wondering if you know if i can just use the '83 electronic distributor. I just bought a new one while i was trying to figure out what is wrong with '83. I'd rather use the '83 ignition, at least for now. I'm just too caught up in other things to fool around with changes.
Thanks again for the response.
 

Last edited by xlhr8r; Sep 9, 2015 at 02:48 AM. Reason: Detail
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Old Sep 9, 2015 | 02:41 AM
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Originally Posted by xlhr8r
Hi, putting a '73 4.9L engine in an '83 f250. Want to know if I need to use a resistor wire for coil. Using complete '73, carb, dist, coil, etc..
The resistor wire is already present.

D7AZ-12250-A .. Resistor Wire-Ignition Coil (Motorcraft DY 213) / Obsolete ~ Available NOS & from auto parts stores.

49" long / Color coded red with green stripes / 1.30-1.40 ohms resistance / #16 gauge wire.

Applications: 1977/89 F100/350, Bronco & Econoline.

DuraSpark electronic ignition introduced in 1974, but not all vehicles came with it until 1976.
 
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