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351m Thermactor plug size Manifold

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Old Mar 10, 2025 | 03:42 PM
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AJ78Bronco's Avatar
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351m Thermactor plug size Manifold
I bought the Edelbrock manifold and did not take out the original plug. Does anyone know what size plug that is? I called Edelbrock and they didn't know. It's the giant hole on the front passenger side of the manifold
 
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Old Mar 11, 2025 | 07:48 AM
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Not sure of the size
My factory Boss 302 manifold has BIG pipe plugs all over, presumably for cleaning
Pretty sure yours are pipe thread, possibly 3/4 or 1 inch NPT, like mine are
 
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Old Mar 13, 2025 | 08:06 PM
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Thank you I'll give those a shot
 
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