Headers and spark plugs

soaringcowman said

Hey guys i'm new to this forum, i've got my self a 1971 Plymouth Duster, 318 car. I just put a set of headman headers on it, and i'm having spark plug issues on the driver rear, i searched for answers but didn't really find anything that helped, So what did you guys do for the rear two driver side spark plugs for clearence with the header. Thanks ALOT guys...Adam

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The easiest thing to do is use Magnum engine plugs. They have a 5/8" hex outer body but otherwise are the same. You can go straight in from above with a 5/8" plug socket and extension.

I like autolite plugs the number to get is a 3924 and if you want to go one heat range colder a 3923.

Also, with the Hedman headers get a couple of plug wires with 90 degree boots for cylinders # 5 and 7 and route the wire under the header tube to the plug.