No prob man. Just wait for the cam to arrive, or check the manufacturer's website and see if you can find specs on that particular cam. That way, you can possibly order a timing set in advance, if Chevys work the same way as ours. I know on Fords you can get a timing set that has different keyways cut into the timing chain sprockets that give you the option of like 4° retarded, straight-up, or advanced. Not too sure on Chevy engines, since I've really never played around too much with them.