Usually you do a spiral type pattern outwards, more important when doing them up. I haven't built a twin cam, but sohc I went 115 on the studs and it's around 40 on the cam caps.
Supercharger. You'd be surprised how much you can spend NA to get such little power. A dude on aff was doing a very well priced pd blower set up. That's the way I'd be going. http://www.fordforums.com.au/showthread.php?t=11392659
The car was at Graham Harris butt plug. I'm sure he knows what he is doing. He said with the gearbox and turbo combination on this car it's an absolute animal.