I've been doing a LOT of reading around here since finding this place and have had very good help/advice so thank you. That said I never said I was a mechanic, just grew up around a bunch - grand-father (dad's dad) had a business rebuilding alternators and starters and he was a mechanic and pilot... All that said, is there a logical reason other than trying to shoot a flame out the back of the exhaust for this?

Nope. Search youtube for 'car with flamethrowers'. Flamethrowers were THE thing to have at the time, and well, some leadsleaders and other custom drivers actually think it still is...
Olaf

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Aspenized

Might be a plug for an unused O2 sender hole.

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Part of Tyrde-Browne Racing

If it's an 18mm plug, that's what I'd say it was for..

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

Ah ha! That makes perfect sense. Especially since the hole looks manufactured; i.e. not custom. Thanks for clearing that up.

When someone told the former owner just to "plug up the hole" he did.

Wait! Isn't that an early California Clean Burn System?

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66 Barracuda /6
01 Ram 2500 Cummins

Pretty much. After I posted that pic on FB his wife wrote this:
Not sure - or are you joking?? It's technically a '79 but they must have not changed up the line until after April that year (inside of the door tag...) because the '79 was the last year for this particular truck and was the only year to have dual headlights - mine does not have dual headlights... I'm pretty certain for all intensive purposes it is a '78

_Sean_, sorry about jumping to conclusions, I thought that was an older car...
Olaf

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Aspenized

I wish. I did have a chance to buy a '56 Chevy steps-side about nine years ago (that actually was running) and the wife talked me out of it. You live and you learn, or at least hopefully...

On a side note: Dude, the underscores are only in front and behind my name because someone else here got the name first.

Most definitely joking. My brothet has a rat rod with a sparkplug he uses to seal up an emissions connection; even uses a plugwire...you wouldn't believe the questions he gets from the kids today about that plug. The funny part is that they believe him when he tells them about the Ninth Plug Ignition System.

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66 Barracuda /6
01 Ram 2500 Cummins

Too funny...

I know, _Sean_, it is just me that got used to writing the usernames as is, it can make a search easier later, but I'll try without: _Sean_
Nope, doesn't work, sorry keyboard stuck to fingers, have to go now...

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Aspenized

Too funny!