Ram Air
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This question has been asked numerous times with many different answers. For me it fit ok on my 73 but there was a motor mount change that year and that could make the difference.
I saw this on this site:
http://www.network54.com/Forum/119419/thread/1336671812/%B470+Mach+I-+Headers+and+intake+fitment
shaker
May 13 2012, 4:13 PM
As far as I know, the Blue thunder manifold will work with the 1970 shaker and the 1971 - 1973 ram air assemblies; unmodified.
The Shelby/Blue Thunder carburetor pad is about 5/8" higher than the production manifold's carburetor pad. The thick rubber seal that seals the 1970 shaker assembly or 1971 - 1973 ram air assembly to the engine compartment hood (bonnet) is capable of compressing to make up the difference in height.
The carburetor is also more centered on the Shelby/Blue Thunder manifold, whereas the carburetor is off-set to the rear of the motor on the production manifold. But again, it appears Ford engineers allowed for enough fore-aft adjustment to make up that difference too.
I've come to the conclusion over the years that the Shelby/Blue Thunder manifold's ability to work with the shaker & ram air assemblies was intentional, since Ford engineers designed both the manifold and the shaker & ram air assemblies.
So the decision is a flip of the coin in my opinion, you won't know till you try.
I saw this on this site:
http://www.network54.com/Forum/119419/thread/1336671812/%B470+Mach+I-+Headers+and+intake+fitment
shaker
May 13 2012, 4:13 PM
As far as I know, the Blue thunder manifold will work with the 1970 shaker and the 1971 - 1973 ram air assemblies; unmodified.
The Shelby/Blue Thunder carburetor pad is about 5/8" higher than the production manifold's carburetor pad. The thick rubber seal that seals the 1970 shaker assembly or 1971 - 1973 ram air assembly to the engine compartment hood (bonnet) is capable of compressing to make up the difference in height.
The carburetor is also more centered on the Shelby/Blue Thunder manifold, whereas the carburetor is off-set to the rear of the motor on the production manifold. But again, it appears Ford engineers allowed for enough fore-aft adjustment to make up that difference too.
I've come to the conclusion over the years that the Shelby/Blue Thunder manifold's ability to work with the shaker & ram air assemblies was intentional, since Ford engineers designed both the manifold and the shaker & ram air assemblies.
So the decision is a flip of the coin in my opinion, you won't know till you try.
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Omie01
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- 1972 H code fastback Boss 351 clone
The Blue thunder maybe, The RPM Air Gap NO. I just bought an air gap, and its 2" taller than my performer. In my car even the performer is a tight fit. My car is a 1972 with the run of the mill Cleveland motor mounts. I was going to buy he BT until I read somewhere that the plenum height is taller than stock, and the price. ($455+$150 for runner equalization?) Might as well buy a Boss intake off Ebay for this kind of money!!!
