ignition questions.
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ignition questions.
I have a '78 F250 4x4, came from the factory with a 351M400 it has a nearly new ignition box, I have a 300 I'm putting in it out of a '84 will the ignition box from the 351M work on the 300?
I'm FAR from needing it but I'm trying to come up with a good parts list, and I'm thinking of getting all MSD but if I can use the stock box then I'll save that money.
I'm FAR from needing it but I'm trying to come up with a good parts list, and I'm thinking of getting all MSD but if I can use the stock box then I'll save that money.
MSEE
Joined: Apr 2004
Posts: 10,386
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From: Austin, TX
What does the ignition box from the '84 look like? Is it the same fender-mount style in your '78? I can't remember what year Duraspark was dropped.
If the two boxes have the same grommet color (where the wires come out), and the wires coming out are the same (meaning the color, number of wires, and how they're arranged in the 2 connectors), then they are interchangeable. If not, then they are not.
If the two boxes have the same grommet color (where the wires come out), and the wires coming out are the same (meaning the color, number of wires, and how they're arranged in the 2 connectors), then they are interchangeable. If not, then they are not.
MSEE
Joined: Apr 2004
Posts: 10,386
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From: Austin, TX
Sorry about that, I read your post backwards. I thought you were wanting to put the '84 ignition box on your '78, but you're asking if you can use the ignition box from your '78 on the '84 300.
If the distributor on the '84 300 has one 3-terminal connector coming from it with an ORANGE, PURPLE, and BLACK wire, then that distributor will be compatible with the existing ignition box sitting on the fender of your '78.
If the distributor on the '84 300 has one 3-terminal connector coming from it with an ORANGE, PURPLE, and BLACK wire, then that distributor will be compatible with the existing ignition box sitting on the fender of your '78.
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If it doesn't, I could use the stock box by changing the distributor, correct?
Sorry if I seem like I'm asking stupid questions but I've learned backwards, I can pull all the EFI and nearly anything off my '96 but I have NEVER delt with anything like this. I'm used to picking through bundles of wires as big around as my big toe and this is like trying to read a different language for me...
Sorry if I seem like I'm asking stupid questions but I've learned backwards, I can pull all the EFI and nearly anything off my '96 but I have NEVER delt with anything like this. I'm used to picking through bundles of wires as big around as my big toe and this is like trying to read a different language for me...
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Well, the pigtail has been cut, but it does have the orange, purple, and black wires coming off it.
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MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
That would be a Duraspark distributor then, and will work. That's too bad that the guy cut it though; it's pretty easy to just disconnect it properly.
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