Spark Plugs Vs Headers

[ronw]

Just finished installing my Headers on the 68 Dart with a 540 stroked engine. It has Elephant ears for mounts. The problem is that #6 Plug clearance is not enough to allow a regular size spark plug. Are there shorties available to fix my problem? My engine is 10.5 to 1 with a 557 lift purple shaft cam and max wedge heads and intake with 1050 carb. What plugs do I need and should I use all shorty plugs or just were needed? Thanks Ron

 

[RustyRatRod]

Sorta.....but not really. Accel has "header plugs" available. We used to call them peanut plugs.......but they are not much smaller at all than a standard plug.

 

[Bigdummy]

What are you using now?

 

[ronw]

Not using any plugs now, just putting engine together. Tried old set of plugs just for mock up knowing that it looked real close.

 

[Abodybomber]

Sorta.....but not really. Accel has "header plugs" available. We used to call them peanut plugs.......but they are not much smaller at all than a standard plug.

This.. Also Autolite's spark plug paper catalog..: In the back ,there's a heat range/physical size page,that you might find helpful. A well build 906 headed 440 in a 4x Dodge truck, needed some shortie plugs to clear cheapo headers. We ended up with three shorties ( lawn mower plugs) ,& five normal plugs ,same heat range. Ran beautiful, plugs had the same color all around.

 

[hangn0ut]

Thats a hell of a design if a plug dont clear properly. I would call the manufacture and see what they say. They gotta be aware of this design defect. Probably end up getting the torch out to make proper clearance.

 

[Abodybomber]

Thats a hell of a design if a plug dont clear properly. I would call the manufacture and see what they say. They gotta be aware of this design defect. Probably end up getting the torch out to make proper clearance.

It was a Pismo Beach "sand drag weekend", last minute assembly /slam it together thing.. The headers were Blackjack ,or Flowtech, as I recall. Good luck calling tech line on either, did the speed shop/retail parts gig. Doesn't happen anymore.
You're right on the torch,didn't have one in my shop ....

 

[jbc426]

540" stroker motor! I love it. These are the types of quality problems most normal people don't have. Best of luck.