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I'm beginning to regret that I posted this thread!

I guess you are referring to P.T. Barnum's quote... "there's a sucker born every minute".

Thank you for the information! Any “ballpark” numbers come to mind for gap spacing?

When I visited the NGK site, I entered “Plymouth Duster 340” to search compatibility and got the response “not compatible with this vehicle”. Do you think this is because NGK’s compatibility search is using “stock”/OEM specs on the motor. I’m thinking that shouldn’t matter since my motor is a...

Hey, a-bodyguy, will these work for me ok? NGK 6509 LTR6IX-11 Iridium IX Spark Plug Thanks!

Thanks for sharing!

Not sure

Hey fishy… I have a ‘72 Duster (built 340) with 11:1 compression. Do you think the NGK 7 (V-power) would be a good choice? Thank you!

I contacted the guy who sold me the car and he said that he always just used the "stock" plugs and never had a problem. But that doesn't necessarily mean that the car was running at its peak performance either.

Thank you for this information!

That's what I am thinking. I think I will also contact the guy I bought it from and see what he suggests. Thanks.

Thanks for the information!

All I know is I had a couple sheets of paper that came with the sale (from the owner) with a long list of mods and specs. I guess I'll just go with a "stock" plug for now and see what happens. Thanks.

Why's that? Do they foul easily, have poor life? What do you suggest for 11:1 compression?

OK... thanks.

Not sure how to go about doing that... suggestions?

Yeah... I've been doing some research, but it's like reading Chinese to me! lol

Hello all... I am going to buy some new plugs for my '72 Duster 340. I am quite the novice here, so I was looking for a little guidance. The specs for my car are listed below. That's about the extent of what I know regarding the car's motor, trans and rear end. Suggestions for plugs? Anyone...

Is the Coronet a 3 speed or 4 speed? Thanks!

245/60/14

I have 205/70/14 on the front. I like the look.

Just found a shop less than 5 minutes away from where I work. Thanks!

Hmmm... I'll try to upload in a different manner.

I see. I'll have to do a little research on that. Thanks again!

This is exactly what my '72 duster is wearing. I really like the look! Google Photos

Thanks. You mean like a Sherwin Williams or Home Depot?

Has a “tough” look!

Very nice! The blue wheels match the body perfectly! Question for you… can you direct me to a place or website where I can get touch up paint. I have a ‘72 Duster with a small chip on the top fender next to the gap between the fender and hood. I need to get that touched up ASAP. Thanks!