Exhaust Manifold?

[KaleSkywalker]

Is there a difference between a AC car vs a non-AC car for OEM exhaust manifolds? I have a 69 roadrunner with AC and I want the correct date period exhaust manifold. Any advice would be appreciated.

-Kale

 

[super-bee_ski]

I am not certain, as I have a 70 Superbee with AC and original 906 heads
But the exhaust manifolds on my car are the HiPo style cast iron.
So, I would say same as non AC cars.

 

[Curiousyellow71]

Same hp manifold for ac/ non ac 4 barrel 383s.

 

[KaleSkywalker]

I wonder why people are posting exhaust manifolds for sale that say non-ac? Would the AC connect in anyway to the exhaust manifold?

 

[68BabyBlue]

My A/C survivor '69 GTX I owned in the '90s had the same style as the numbers matching '69 4 speed I just sold. So unless the A/C Road Runners are an exception...

 

[BLK 68 R/T]

HP manifolds would be correct. There was no standard manifold available on a roadrunner in 69.

 

[Curiousyellow71]

I wonder why people are posting exhaust manifolds for sale that say non-ac? Would the AC connect in anyway to the exhaust manifold?

No idea why they would bother saying non ac for a hp manifold description . Same part number whether on a 383 or 440 when it came with dual exhaust. 2 barrel engines had log style manifolds. Manifolds have a date and a casting number. Year one has also been reproducing them, or at least selling them.

 

[Ranger16]

Would the AC connect in anyway to the exhaust manifold?

NO. No connection whatsoever.

 

[randys4406]

The casting numbers are 2806900 for the left side and 2843992 for the right side.

 

[randys4406]

One is date coded 4-68 and no date on the other

 

[KaleSkywalker]

Okay, I need some more confirmation here. The casting numbers listed above are for both low performance 383’s and High performance 383’s for 1969 roadrunners?

 

[440 Charger]

NO. No connection whatsoever.

The A/c is totally in the exaust amnifolds.

 

[Curiousyellow71]

330hp isnt exactly what I consider low performance.. but it used the same manifolds both intake and exhaust as the 335hp magnum

 

[440 Charger]

330hp isnt exactly what I consider low performance.. but it used the same manifolds both intake and exhaust as the 335hp magnum
View attachment 1146368

Remember all now have 1000 plus lol. I am doing old 3 inch side pipes.

 

[randys4406]

Okay, I need some more confirmation here. The casting numbers listed above are for both low performance 383’s and High performance 383’s for 1969 roadrunners?

They will fit both engines. They were put on HP engines for more power . They HP manifolds flow better than the LP ones. Also have a larger opening for the head pipes. Send a PM and I will post some pictures.

 

[440 Charger]

They will fit both engines. They were put on HP engines for more power . They HP manifolds flow better than the LP ones. Also have a larger opening for the head pipes. Send a PM and I will post some pictures.

Head pipes what the heck are thoes? is that more power?

 

[randys4406]

That is the part of the exhaust pipe with the flange that bolts to the manifold.

 

[Curiousyellow71]

All 68-69 road runners had dual exhaust. The log manifolds are what went on single exhaust cars.