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I call it a "2bbl cam" to note the difference between it and the cam used in the 383 335HP engine.



Fair enough until someone uses that as the reason the 67 A body 383's had less hp than the 67 B body 383's, then you have to explain, well, they have the same cam.





Curtis , here is what I said above ....

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I don't know a lot about the 67 , they would have had 516 heads and I think it was based off the 300HP 383 , the left manifold was more restrictive on the 67 , they changed the manifold for 68 and used it on 69. I never compared the specs on the 68 , based on the lower HP engine, and by the way the 68-69 330HP 383 used the 2bbl cam.



I never claimed the 67 used the "2bbl cam " only 68 ... I don't remember clearly but I had a 330HP 383 in a 68 b body , pretty sure it had the 2bbl cam when I looked up it's specs ... but definitely in 69 the 330HP engine had the smaller cam.

If you look at NHRA specs , not that I agree that they are definitive , it shows the 330HP engine with the smaller cam . Now I have to look at it to see what cams it calls for in 67 and 68 .

Jim , best I can tell 68 and 69 used the same exhaust manifolds , but you would no better than myself .