I wonder if by "jacket", he means the shaft part of a two piece crankshaft pulley? Either way, you should be able to figure out the tooth just to the right of the keyway is the timing tooth. Remember that the cam gear will turn some as it's installed, so be sure to start it in the right groove.
Yep, just as I suspected, it's the two piece pulley. That oil slinger looks like it's on backwards, but I need a clearer picture.
Also, is that the lighting, or is the crank gear rusty? You sure don't want to start out with rust.