What exhaust manifolds were original on a 73.

[bandit67]

Guys, bought a new stock exhaust system for my 73 440. Now I am concerned that the HP manifolds I plan to use may not fit up with the stock pipes. I have a set from a 76 that I am wondering if they might fit better. I guess I m asking what all manifolds have the same turn out angles that would fit my stock exhaust. Is this info available somewhere....thanks

 

[monaco66coupe]

Guys, bought a new stock exhaust system for my 73 440. Now I am concerned that the HP manifolds I plan to use may not fit up with the stock pipes. I have a set from a 76 that I am wondering if they might fit better. I guess I m asking what all manifolds have the same turn out angles that would fit my stock exhaust. Is this info available somewhere....thanks

you need 3751367 and 3751369 for 73 400-440 HP manifolds.
If you purchased correct to the year, the numbered manifolds will fit fine.

 

[Master Gunner]

You can get head pipes from TTI that will fit the casting numbers of your manifolds.

Mark

 

[bandit67]

Thanks Guys, Mark, I have a brand new stock pipe exhaust system and so I wish to ensure my manifolds will bolt up BEFORE I drop in the motor. Just easier on this old bod to change them with the motor out...

 

[monaco66coupe]

Thanks Guys, Mark, I have a brand new stock pipe exhaust system and so I wish to ensure my manifolds will bolt up BEFORE I drop in the motor. Just easier on this old bod to change them with the motor out...

do you have the correct manifold application for already?

 

[bandit67]

Apparently not. I looked at the ones I have and they are not the castings you gave. Just wondering if any of what I have will work. I know they will all bolt up, but wondering if the angles at the manifold-tailpipe bolt up are all the same.

 

[T2R9]

What are the castings you have? 70-74 BB HP manifolds are all clocked the same. 68-69 pass is clocked differently.

 

[bandit67]

68 HP casting are what I have. I have a 76 stock motor with castings, would that late be clocked the same.....no? Not sure what years my other two 400s are.....

 

[T2R9]

I am not sure on the 76's never tried anything that late. If the pipes are made for the 73 the 68 manifold will not work.

 

[bandit67]

Thanks T2, thats what I am learning....so to find what will.

I am not sure on the 76's never tried anything that late. If the pipes are made for the 73 the 68 manifold will not work.

 

[T2R9]

The drivers side 68 will work, just got to get a correct passenger side.

 

[Master Gunner]

My casting numbers are for a 73-74 B body,
L 3671595
R 3751071
I went with TTI head pipes and H pipe, but those numbers will work with the factory pipes.

Mark

 

[Trench]

Here are pictures of the manifolds from a 73 Roadrunner with a 440HP

 

[bandit67]

Thanks Mark and Trench. I think I have a lead on the 3751071 right side and am still looking for either the 3751068 or 3671595. With yall s help I now know what I'm looking for.

 

[JG71B]

I possibly have a set for 3 andv4 specific as nice as the ones above. Ill lyk