[superdutybob]

Minimal at best! I would NOT hog out a set of manifolds. Not worth the effort. An open scoop, RAIII manifolds, a cam (not 068), and good exhaust can make a huge difference. The 068 cam has no lift and really is geared toward a higher compression ratio. There are much better choices for cylinder filling and the 8.1 CR that you will have.

[HWYSTR455]

Originally Posted by superdutybob

...The 068 cam has no lift and really is geared toward a higher compression ratio. There are much better choices for cylinder filling and the 8.1 CR that you will have.

Agreed. There are much better choices for cams out there, and the engine in question is a prefect candidate for one of the 'cyl-filling' profiles that build DCR.

To pick up a little more CR, you could swap to a thin head gasket, or even consider milling the heads. That would open you up to an even better cam selection.

You can look/search in the Street section, there are plenty of threads regarding cams for almost every combo you can imagine.

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