spark plug
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Joined: Oct 2009
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From: Burbank, WA
Fleet Mechanic
Joined: Feb 2004
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From: Arlington,Wa
Hotshot
Joined: Oct 2009
Posts: 16,135
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From: Burbank, WA
Would you care to expound on your statement? Perhaps you could give us your definition of "stock ignition system"? Ford has been using some type of high energy, electronic ignition system since 1975, and these plugs have been used by Ford for at least 30 years. They came in my 97 F250 460 as original equipment, I have them in my 87 F250 460, which has the same "stock" Duraspark II ignition as the OP's 77 and they're working just fine. I expect them to outlast any ordinary copper plug. Not being argumentative but I'm curious to know why you don't think they'd work?
Logistics Pro
Joined: Jun 2004
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From: South Central Utah
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Mountain Pass
Joined: Aug 2021
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These one?
https://www.summitracing.com/parts/atl-25
and by the way, recommendation for spark plug wires ?
https://www.summitracing.com/parts/atl-25
and by the way, recommendation for spark plug wires ?
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Fleet Mechanic
Joined: Jul 2017
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From: East Texas
For plugs, I have always been told and used Motorcraft copper plugs for these age of trucks.
For plug wires I have always used Belden from Napa. They always fit great and are really affordable.
For plug wires I have always used Belden from Napa. They always fit great and are really affordable.
Lead Driver
Joined: Nov 2006
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From: Pa.
Tuned
Joined: Jun 2018
Posts: 458
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From: Arkansas
Would you care to expound on your statement? Perhaps you could give us your definition of "stock ignition system"? Ford has been using some type of high energy, electronic ignition system since 1975, and these plugs have been used by Ford for at least 30 years. They came in my 97 F250 460 as original equipment, I have them in my 87 F250 460, which has the same "stock" Duraspark II ignition as the OP's 77 and they're working just fine. I expect them to outlast any ordinary copper plug. Not being argumentative but I'm curious to know why you don't think they'd work?
Trailering
Joined: Feb 2023
Posts: 22
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