That's normal engine building procedures, not necessarily cam swap procedures. If I am just swapping a cam in an already running and broke in engine I don't preoil it at all. I just fire it up.
Exactly, most people aren't going to do that for a cam swap. A buddy of mine swapped cams, followed comp instructions, and had noisy lifters. We told him to take them out and soak them in oil. He bought another set, followed their instructions, and again had noisy/bleeding down lifters. He took them back out and soaked them and presto no more noise.
OP those 924 valve springs are only about as stiff as most performance singles, and actually weaker than Comp's own 911 single spring (more goofyness from Comp cams). I would advise you to do the same as my buddy, remove the lifters and soak them in oil. You want to make sure that they go back on the same lobes though.
Also, when you install new lifters, you should follow normal new cam break in procedure.
