I never turn a engine over any more then needed to get it assembled. Once together, I leave it alone till the day of start up and break in. I never start one with out breaking it in at the same time. Parts and labor is to expensive to risk just messing about with it. Any of the name brand cam grinders will tell you, its the first few seconds of a new cams life that determine if it lives or dies. Some of the new V8 lifters now have a oil groove cut on the out side of them to spray extra oil on the lobes, its just that important to keep them oiled!
If the engine is in the frame, you can go ahead and start it up.
Do a proper break in run, if you don't have the 20 to 30 minutes needed for break-in, don't bother starting it.
Old used cams and lifters with weak valve springs will not be so touchy about the break in. In fact you may not need to worry at all with a bottle EOS added to the oil, or high grade break in oil, its new cams and lifters you need to worry about. Bearings just need oil ASAP. The rings will break in under a load once the truck is road worthy.
The key points to watch is oil pressure and temperature, keep the first one high and the second one low!
Every time you turn the engine, you wipe the assembly lube off the bearings and cam. You must prime the oil system so once it starts it has oil pressure to replace what is now missing. Any delay in oil can lead to trouble, even just a few rotations!
Joe
