I couldn't disagree with 911st more. Absolutely DO NOT cross drill your crank if you want to set a rev limit higher than 7K.
When you turn the crank faster, it is harder for the oil to counteract the centrifugal force on its own weight and get to the rod bearings. In order to correct this problem you need to have plenty of volume capacity (you have a good start with 964 pump), and plenty of pressure (you need to raise the relief pressure). Cross drilling hurts both (bleeds off volume and lowers pressure). No less an authority than Scat Crankshafts, who have been making VW cranks for years, will not warranty their parts if they have been cross drilled. Neither will Porsche. Here is the Scat Crankshafts statement on the subject:
http://www.scatcrankshafts.com/scattechpdfs/Cross_Drilling.pdf
The "NASA" bearing mentioned are referred to as "sputter" or "vapor deposition" bearings in the industry. Here is a link to the Federal Mogul/Glyco site that describes these bearings:
http://federal-mogul.com/en/AftermarketSolutions/EMEA/EngineSolutions/Products/EngineBearing/GlycoBearings/SputterBearings/
I can hook you up to a set, but I need your crank data. PM me if you are interested.
For a true 8K rev limit, I can only recommend Titanium connecting rods. The Carrillo rods are lighter (173 recip vs 195 recip for stock), and have 9.5mm bolts vs 9mm for stock, but I would like to see more margin than that for a true 8K motor. Remember, the rob bolt load goes up with the square of engine speed. Ti rods cost twice what Carrillo rods do. That is why there are very few real 8K motors out there. It takes alot of intake, head, and exhaust work to make use of 7.2K, let alone 8K. For most it makes more sense to build a 7.2K motor and keep making the mortgage payments.