340/360 exhaust manifolds A,B,C,E bodies the same ?

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rustytoolss

rustytoolss

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Were 340 and or 360 exhaust manifolds the same for all body lines A,B,C,E ? Anyone got pictures showing the differences ?(if there were any differences). Is there much difference between 340 and 360 manifolds ? just asking ?
 
Lots of differences over the years.

The 1968-70 340 A & E body type is what most people want.

By the time the 340 was in use in B-bodies (1971), they changed manifolds.
 
all 360 manifold styles were different based on A,B, or C Body.68-69 340 is one style, and is of the highest quality. The 1970 looks the same, has the same number, but is much cheaper looking. The 71-73 is another. The 71-73 340 manifolds will fit the A and B body,but resemble the 318 manifolds. By the smog years of 74, they changed again.
 
68 / 69 340 A body

2016-11-14 exhaust steering 006.JPG


2016-11-14 exhaust steering 001.JPG


2016-11-14 exhaust steering 005.JPG


2016-11-14 exhaust steering 009.JPG
 
I wouldn't bother with 340 manifolds to expensive. There barely and power difference over 360. Even 318 manifolds are within 5 hp. If you got cash or looking for stock 340 look.
 
273 said:
I wouldn't bother with 340 manifolds to expensive. There barely and power difference over 360. Even 318 manifolds are within 5 hp. If you got cash or looking for stock 340 look.
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That's in part what I wanted to know. If using a set of 360 manifolds were close enough with lower cost. Thinking of buying 71 RR (no driveline) Want to install a 318/360. But did not know if I would need that special driver's side manifold to wrap around the steering shaft.
 
The consensus back in the day was that the factory 340 manifolds were a good high flow performance part. I went from headers back to manifolds because of the issue with header fit. the last I knew , it was just as expensive to run good fitting headers as it was to run factory style 340 manifolds.
 
rustytoolss said:
That's in part what I wanted to know. If using a set of 360 manifolds were close enough with lower cost. Thinking of buying 71 RR (no driveline) Want to install a 318/360. But did not know if I would need that special driver's side manifold to wrap around the steering shaft.
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The 71 models don't wrap around, they look more like the 318 version. I would use the 360 manifolds and custom exhaust. the engine will run fine, and it is cheaper. The 68-70 340 was a 10:5 compression, the 71 on was 9:5, so the performance was ebbing anyway.
 
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