273 Commando Manifolds

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Rustyfish

Rustyfish

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There is a guy near me who has a set of these for sale. Would there be any advantage to these over my standard 273 manifolds? Are they any different?

Thanks
Bruce
 
There is a difference in 273 manifolds for year models. The later ones do flow a little better than the earlier. Earlier left manifold had a nearly 90 degree crook at the bottom of it.
Later is a shorter casting. Then a little different turn with the head pipe there helped flow a little. Not enough difference to spend coins on.
 
RedFish said:
There is a difference in 273 manifolds for year models. The later ones do flow a little better than the earlier. Earlier left manifold had a nearly 90 degree crook at the bottom of it.
Later is a shorter casting. Then a little different turn with the head pipe there helped flow a little. Not enough difference to spend coins on.
Click to expand...

I would agree but 67 was the last year for the Commando/ Charger 273. 64-69 all used similar if not identical manifolds. # 769 was listed as a right hand from 64-68 for 273/318 A & B bodies. The #847 is a left hand manifold from 64-66 A body only. the other left manifold for A bodies is a #945 which fits 67-69 A bodies only with a 273 or 318. That manifold probably flows better but really isn't designed for the early A bodied cars. It would work on the early cars with a little modification. tmm
 
There may be a difference from year to year, but there never was a set of "HP" or "Commando" manifolds for the 273.
 
toolmanmike said:
I would agree but 67 was the last year for the Commando/ Charger 273. 64-69 all used similar if not identical manifolds. # 769 was listed as a right hand from 64-68 for 273/318 A & B bodies. The #847 is a left hand manifold from 64-66 A body only. the other left manifold for A bodies is a #945 which fits 67-69 A bodies only with a 273 or 318. That manifold probably flows better but really isn't designed for the early A bodied cars. It would work on the early cars with a little modification. tmm
Click to expand...

Years ago a local mopar man told me that they deleted what he called "their crazy crook" because it was too easily broken. A little better flow in through the cross over under intake was a side effect. He said, "They only made it that way for ease of assembly in the first place". That's all trivia and off topic anyway. Cheers
 
RedFish said:
Years ago a local mopar man told me that they deleted what he called "their crazy crook" because it was too easily broken. A little better flow in through the cross over under intake was a side effect. He said, "They only made it that way for ease of assembly in the first place". That's all trivia and off topic anyway. Cheers
Click to expand...

"Crazy crook" That's the right name. If it wasn't for the steering shaft there wouldn't be a problem. LOL
 
I looked at these many times and have never found a significant different between the "so called" Commando or HP 273 manifolds or regular 273 manifolds. I think it has to do with the exhaust system (exhaust pipes).
Maybe someone else has better knowledge about this issue??

Treblig
 
It seems everyone has an idea on what the HP exhaust was or wasn't for the Commando 273 but unless they actually had a car with the HP single exhaust, it's all a lot of speculation. These guys - http://www.accurateltd.com/A-Body-HiPo-Exhaust-System_p_195.html seem to have it down as "accurately" as anyone IMHO and if I ever restore my 67 back to original, I will be giving them a call.
 
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