Big block hp manifolds

[340Challman]

I am trying to find a definitive answer to what the differences are between the B body and E body hp manifolds. All the searches that I have done around the internet have netted definite ambiguity. Generally all I hear is "slight differences". Does anybody know exactly what "slight" is and where I'm going to see "slight"? 

[1971Y13]

No difference, same # number.

[anlauto]

The difference comes in the different year B Body manifolds, but if you're comparing 1970-1971 B & E manifolds, then there is no difference.

66-67, 68-69 B Body manifolds are different then 70-71.

[Cuda Cody]

 

[340Challman]

So how are the 68-69 manifolds different from 70-71? I need a set for a 383 I have and am thinking of putting it in my Challenger. Most manifolds that I've found are 68-69. Like I said, some say only slight differences. 

[Chryco Psycho]

I am trying to find a definitive answer to what the differences are between the B body and E body hp manifolds. All the searches that I have done around the internet have netted definite ambiguity. Generally all I hear is "slight differences". Does anybody know exactly what "slight" is and where I'm going to see "slight"? 

Welcome to the site 
the angle of the bolt locations change on the flange [clocking]  with different years , C body manifolds are very different , make sure if you order pipes from TTI to give them the manifold casting #s so they can match the flanges 

[340Challman]

CP,  So am I understanding you correctly that it is simply the clocking location of the manifold flange studs to head pipe? There isn't a drop location difference or angle difference?

[750-h2]

There is a significant angle difference on the passenger side.

[GrandpaKevin]

So will 68-70 B body big block HP exhaust manifolds work on a big block E-body?

I was always under the impression they would.

[RUNCHARGER]

Yup: The 68-71 B-bod manifolds will bolt right in. However the clocking on one of the 68-69 manifolds is different and you would have to cut the headpipe flange off and change it's position to work with the older manifold.

[anlauto]

68-70 B Body manifolds do not exist . 1970 is different .

[340Challman]

The reason I'm trying to hash this all out is because I have a line on a pair of 68-69 hp manifolds that the guy just wants gone. If I were to install them I would have a complete custom exhaust bent and installed. So it is sounding like I would run into no problems with install other than just not being correct.  Nothing better than almost free parts. 

[Chryco Psycho]

I see no problem with that , they will fit & work

[Fern]

Not to hijack this thread, but is all stock manifolds hp? All years?

[Chryco Psycho]

No
The 2bbl engines or low performance engines had log type manifolds , the HP manifolds were upswept & flowed much better than the logs