Mike,
I'm no expert too but I think EFI opens up a whole lot more possibilities that we never had with the standard SC CIS or the C3.2 air flow meter.
John Dougherty recommended his 993SS cams (242/228 duration @50thou and .490"/.455" lift with 114 lope centres) as the practical maximum for an air flow meter equipped 3.2. I see the Webcam's 464/465 is not a huge step further on. (
Web Cam Inc. - Performance and Racing Camshafts / Porsche 911 SOHC 12v Timing Card )
However possibly more importantly, I recall Steve Weiner cautioning the use of cams hotter than 993SS cams in street 3.2's with standard gearing due to the loss of bottom end torque that he has found to come with these cams. I'll try and find the reference but it certainly helped make my mind up with the cam going into my EFI single throttle body 3.4 build. I can certainly confirm that mine is pretty underwhelming under 3,500rpm!
Unfortunately I haven't seen any posts previously describing the build trond is proposing (and I've been looking for years!) so am keen to see how it works out and learn a few things!