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That's a solid, proven combination, Scott. I assume you stuck with the CIS, hence the 964 cams.
Going to carbs, MFI, or modern EFI really opens up the selection of camshafts. CIS limits cam timing in that it cannot tolerate any reversion into the airbox (also known as the plenum chamber). Any reversion confuses the MAF sensor. As a result, they need pretty mild cam timing. The 964's or Webcam 20/21's are the accepted "hot rod" cams for CIS, but they are very mild compared to what we can run with an induction change.
Since the OP has 46mm PMO's already, he can go with much more aggressive cam timing. The afore mentioned GE or DC 60's are about where we start talking about suitable 3.0 liter cams that are no longer constrained by CIS.
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Jeff
'72 911T 3.0 MFI
'93 Ducati 900 Super Sport
"God invented whiskey so the Irish wouldn't rule the world"
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