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Old 07-17-2018, 08:18 AM   #1
flemingo
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Which spark plugs do I use>

I need new plugs in my 70 C10 with a bone stock 350 4brl engine. The book calls for R44. Which plugs should I use?
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Old 07-18-2018, 09:42 PM   #2
Metaldoc
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Re: Which spark plugs do I use>

Quote:
Originally Posted by flemingo View Post
I need new plugs in my 70 C10 with a bone stock 350 4brl engine. The book calls for R44. Which plugs should I use?
They should work fine, A/C R43 R44 with .030 gap. If it has HEI R45ts .040-.045 gap.
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Old 10-26-2018, 12:41 AM   #3
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Re: Which spark plugs do I use>

What's the thread size for spark plugs?
I'm thinking it's the 7/16" instead of the 14mm right?
Orilies is showing a LOT of the 14mm...
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Old 10-26-2018, 08:33 AM   #4
Metaldoc
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Re: Which spark plugs do I use>

M14 x 1.25 is the plug tap I have for sbc
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