1969 Spark Plugs

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Aug 26, 2019 | 07:38 PM

Jim Coscette

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Heel & Toe

Joined: Jan 2019

Posts: 23

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1969 Spark Plugs

Newbie here...I want to change my spark plugs on my 1969 small block 350cu/300hp. Manual says R-44, the car currently has 43S. What would be the best replacement? Thanks!

Aug 26, 2019 | 07:47 PM

fake

Safety Car

Joined: Jan 2004

Posts: 4,549

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From: Glastonbury CT

How does it run on the existing plugs? If well use the same. Alot of these plugs can be cross reference with other brands if you like. Just use the gap the book suggest. Good Luck!

Aug 27, 2019 | 09:31 AM

VERYSOON

Burning Brakes

Joined: Oct 2001

Posts: 926

Likes: 200

From: TX

Morning Jim

I have the same engine and, after a bit of research, chose to use NGK XR5 plugs (Part #3332) gap 0.035
Vette runs great!

Old plugs were AC R45

VERYSOON

Aug 27, 2019 | 01:50 PM

Barry's70LT1

Melting Slicks

Joined: Oct 2001

Posts: 2,065

Likes: 1,395

From: Halifax, Nova Scotia, Canada

I've been using NGK B4 for many years. Non resistor, just a good regular plug.

The last AC plugs I bought were made in Mexico and were junk, that's when I switched to NGK.

Aug 27, 2019 | 05:19 PM

69monzacpe

Burning Brakes

Joined: Nov 2005

Posts: 1,137

Likes: 51

From: Cartersville GA

I'm also using XR5 NGK spark plugs (NGK 3332) for several years and I've been very happy with them.

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