What oil for my new engine

The "500mile" interval is because they are not loaded with detergents. Brad Penn is another good choice although harder to find from what I understand (I'd have to have it shipped from somewhere), and Joe Gibbs is also a great choice. These are race oils because of the lower or non detergent component. But with limited use and much better than factory recommended oil changes on thes especial vehicles, this is not an issue. Up here, the cars get about 3500 miles a summer at tops, with most getting less than 2K. The oil does just fine. Non detergent oils were what many of these engines began life using and they will never have the long term issues a stock engine has such as lack of care. (Such as mine :D. I change the oil in my Neon once a year so the filter doesnt rust thru...) In terms of cam break in, as Loco said.. Run no inner springs for teh break in time on any application calling for duals, make sure the lifters rotate in the block during assembly, and measure the lifter to bore clearance to make sure it's not too loose, make sure it fires immediately and that all is in order to break in the cam right, and be realistic with the cam lobe design as it pertains to the vehicle's use, and you wont wipe a cam out.