Do you have a source for 18 MM racing plugs? I went to 10 MM plugs and may
go to 12 MM for the ease of getting all kinds of plugs from motorcycle
dealers. Rich Fox
----- Original Message -----
From: <MPHRACING@aol.com>
To: <land-speed@autox.team.net>
Sent: Tuesday, September 23, 2003 11:58 AM
Subject: Spark plug thread inserts
> I am in the process of repairing a set of cast iron Ford heads that the
spark
> plug threads are stripped. The original thread is a tapered seat 14 M.M.
> thread. I can get thread inserts from Time Fasteners to repair the thread
to
> stock, but that requires the head be tapped out to 18 M.M. Would I be
better off
> just to tap the head for 18 M.M. and use an 18 M.M. gasket type plug. The
> engine will be using an 871 blower.
>
> MPH Dave
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