I know Robert Cutler drove a 911 at the Lake Superior ProRally this past October.
I don't know how to contact him, but if you ask around on
www.specialstage.com, you'll probably find someone who knows him.
Jeff
Edit - here's some information for the first of your other two questions:2) The portion of the CARS rulebook that deals with vehicle preparation and class eligibility is online here:
http://209.250.151.132/CARSRally/Portals/0/2005_Rules_NRR%20II_e.pdfThe class will depend on engine displacement and what modifications you make.
To check if you're eligible for Group 2, use the factors on page B-19; multiply the actual displacement by all of the relevant factors to get your adjusted displacement (e.g. a 2000 cc pushrod engine with 4 valves per cylinder would be 2000 x 0.8 x 1.15 = 1840) - if your adjusted displacement is higher than 2400 cc, you're ineligible for Group 2. You didn't mention if your 911 has a turbo - Group 2 cars must be normally aspirated.
For Production class, you'd be in P4, since either engine you mentioned is more than 2000 cc. All modifications to the car would have to meet Production rules.
If you can't fit into either Group 2 or P4, the car would be classed as Open.