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Old 09-13-2018, 08:40 PM
spdbrake spdbrake is offline
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Bill, From an earlier post you listed your build being a 331SBF with Trick Flow 205cc heads.

From the Trick Flow catalog they list an Autolite 3924 as the plug if that helps.
https://static.trickflow.com/pdf/catalog_2018.pdf (page 41)
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