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Which distributor cap?

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Old Jul 4, 2011 | 05:18 PM
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Which distributor cap?

Hey guys, I am trying to eliminate my missing problems on my 77 F150 351M, as far as I know it has the factory distributor, and before I try and get the distributor loose(its ceased in the block, and I will probably bust it) I want to try and replace the cap, and rotor and see if that makes a difference......


which one of these cap kits would I need? Or something else better?

MSD Ignition 84085 MSD Ignition Rynite Distributor Cap and Rotor Kits

MSD Ignition 8414 MSD Ford V8 Cap Kit

also, my plug wires are pretty new, if I go with one of these caps do I need different plug wires or anything?
 
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Old Jul 4, 2011 | 07:39 PM
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Neither of those. Go to your nearest parts store and get a standard OEM-style cap for $10. It's just a piece of plastic.
 
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Old Jul 4, 2011 | 08:29 PM
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I disagree, get a quality cap and rotor with copper parts. Also use quality plug wires and copper plugs. You don't need top of the line, just copper quality.
 
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Old Jul 4, 2011 | 08:31 PM
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Originally Posted by planehunter
I disagree, get a quality cap and rotor with copper parts. Also use quality plug wires and copper plugs. You don't need top of the line, just copper quality.
Very true, and brass parts does the trick, too.
 
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Old Jul 5, 2011 | 06:04 AM
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I agree that I want one with brass, or copper contacts............so, which one of the above would work if anyone knows?
 
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Old Jul 5, 2011 | 07:02 AM
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I agree with fmc400 on this. That aside, if you have the male prong DSII cap now, your plug wires will work. If it's the DSI female connections then no. Personally, I never buy from Jegs due to the fact they tack on a "handling" charge to each order. Summit beats them everyday.
 
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Old Jul 5, 2011 | 08:46 AM
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Originally Posted by planehunter
I disagree, get a quality cap and rotor with copper parts. Also use quality plug wires and copper plugs. You don't need top of the line, just copper quality.
Copper vs. other contact materials is not my point - my point was it makes no sense to spend almost $40 online on a "performance" distributor cap when that's clearly not the goal here. My "$10" reference is simply an allusion to the fact that the basics will do here. If a copper-contact cap costs more than $10 in practice, then by all means go for that. Whatever the end result ends up being, this problem can be solved by a quick trip to Napa.

Originally Posted by buckshot1822
I agree that I want one with brass, or copper contacts............so, which one of the above would work if anyone knows?
I don't know if an MSD cap will fit on a stock Ford distributor, because it doesn't matter - we're telling you that there is no reason to do this because this is a commonly stocked item at any parts store, and is very straightforward. If you're under the impression that switching from an OEM distributor cap to an MSD cap will solve a misfiring issue, then you are mistaken. But, it's your truck.
 
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Old Jul 5, 2011 | 10:31 AM
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I plan on calling all of the local shops today, and checking what they have........I realize that these MSD caps have no advantage over any other cap I can get locally.......I just dont want a cap with aluminum contacts thats all....
 
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Old Jul 6, 2011 | 08:38 PM
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Just letting you guys know, I think I got the issue taken care of..........I bought an Echlin cap and rotor from Napa...........which by the way ended up costing $35.......

This helped the problem a lot, and then today I clamped visegrips on the distributor shaft, and worked it loose with a hammer(It had been soaking in PB Blaster for 3 days)..............I advanced the timing a little bit, and that seemed to pretty much completely eliminate the backfiring issue I had.......
 
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Old Jul 6, 2011 | 08:51 PM
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That's great; glad to hear you got it worked out.
 
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