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Old 08-13-2016, 02:45 AM   #1
paintinx
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Join Date: Jul 2016
Location: Erfurt
Posts: 51
proper gap 454 / big block 1979 c20

Good Morning.

I have a special question to my 79suburban.

I bought new sparks for the engine and meassured the proper gap
from all sparks. it was 1mm / 0,039inch.

The new sparks have the gap 0,8mm / 0,032inch.

What is your advice?

leave it as it???

Best, Stef
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