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-   -   crappy crab style distributor cap (https://www.offshoreonly.com/forums/general-q/385296-crappy-crab-style-distributor-cap.html)

sutphen 30 05-03-2025 05:07 PM

here you go

https://www.summitracing.com/parts/s...MaAkEzEALw_wcB

compedgemarine 05-03-2025 05:41 PM


Originally Posted by sutphen 30 (Post 4925494)

that looks like what I need but it did not come up when I looked at summit earlier because for some reason it is listed as small block only even though they are the same. didnt think to look under small block as you would think summit would have fixed their search engine by now.
thanks for finding it for me.

bajaman 05-04-2025 06:18 AM

lol...now I get the 'crab' reference!

DrFeelgood 05-04-2025 07:47 AM

The NAPA Echlin RR207 is brass and has a good reputation.

BadDog 05-06-2025 07:54 PM

[QUOTE=DrFeelgood;4925518]The NAPA Echlin RR207 is brass and has a good reputation.[/QUOTE
Looks like AL now

https://www.napaonline.com/en/p/ECHRR207

AmiableDave 05-06-2025 08:58 PM

MSD 8017.. $87.99 ea. Cap with brass. Comes with rotor. You got about 2 years out of them.

DrFeelgood 05-07-2025 07:19 AM

[QUOTE=BadDog;4925711]

Originally Posted by DrFeelgood (Post 4925518)
The NAPA Echlin RR207 is brass and has a good reputation.[/QUOTE
Looks like AL now

https://www.napaonline.com/en/p/ECHRR207

That's disappointing. I bought one with brass terminals for ~$35-40 just about 2 years ago.

DrFeelgood 05-07-2025 07:26 AM

FYI, here's an assortment of caps from RockAuto, some noted as having brass terminals. I'm not sure about the vented/non vented aspect, I suspect we're supposed to use non-vented to avoid igniting fuel vapors. The OE part from GM is D329A and it has aluminum terminals, FWIW.

https://www.rockauto.com/en/catalog/...butor+cap,7120

On the GM truck forums (Vortec 5.0, 5.7, and 7.4 all use these crab caps), the United Motor Parts version gets good reviews.

compedgemarine 05-07-2025 07:58 AM

I ordered the one from summit with brass and a vent. it is going in my truck so no problem with the vent. the one I ordered says 5.0 and 5.7 and has good reviews. oddly enough they list a separate one for the 7.4 (what I have) that is a different part number and does not have the best reviews. we will see how it goes. my thinking is the aluminum ones burn the surface of the aluminum after they run and starts the corrosion and since I dont drive it a lot that corrosion builds up instead of burning off and creates the misfire, or at least makes it worse. time will tell.

SB 05-07-2025 08:23 AM

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.035-.040” good.
.060” sucks and causes many issues


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