RE: oil recomendations
It is VERY IMPORTANT that you use 15W-40 diesel oil for break in!!!!!!!!!!! I cannot emphasize this enough. Use something like Shell Rotella T, Chevron's Delo 400, or Valvoline's Fleet 15W40 (or the Napa brand stuff, which is the same).
In the past 5-10 years the EPA has cracked down on oil manufacturers to cut zinc dithiophosphates and manganese out of most street oils to reduce pollution. Likewise, in the past 5-10 years a lot of people have been wiping out flat-tappet camshafts during break-in or several hundred miles down the road.
In addition to being hazardous to the environment, these chemicals react with the metal friction surfaces (ie. cams and lifters)in engines to form a protective boundarylayer should metal to metal contact occur. This isn't much of a problem in newer engines with roller camshafts, but it's a big problem for those of us running older engines with flat-tappet cams. It's so much of a problem that several magazines have put out articles about it, and Comp Cams even sends out a flyer with every cam they sell explaining the problem.
Diesel oils still have these chemicals in them, and therefore make great break-in oils. They prevent metal shearing should metal to metal contact occur during break-in, the most crucial wear period of the cam. There are also additives you can buy from the cam mfg's to add to standard oil, but diesel oil works just fine.
Some of the off-road racing oils like Royal Purple and Redline also have the proper chemicals in them, but you shouldn't use synthetic oil until 10k or so miles. Synthetics are actually so good at lubricating that they don't allow the friction surfaces to properly wear into eachother.