Blue Thunder Head ?

1075 Views 2 Replies 3 Participants Last post by DaveMcLain, Jun 25, 2010

Discussion Starter · Jun 25, 2010

What spark plugs are used in the GM exhaust flange heads ?

Thanks
Jim

1 - 3 of 3 Posts

I used to own a set. Ran Autolite Racing AR3933

3/4 reach gasketed with a 5/8 hex. Something similar to an Autolite 3924 dimensionally will work.

1 - 3 of 3 Posts

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