3-way crank gear any ideas
I bought a 350 from a guy and wanted to change the cam in it. I tore into it and didn,t pay any attention, to the chain and gear ,how ever they looked new,when I got my new cam in, and went to put the chain and gear on I noticed the crank gear had 3 key ways in it. Keep in mind I did not pull the crank gear off, when ever I put the cam dot and the crank dot together N0.1 piston is not at TDC,however if I turn the crank 4 teeth counting the one with the dot there is another dot and then N0.1 is at TDC,also on the crank gear it has 2 deg stamped on it. Do I need another chain and gears or set this up with NO 1 at tdc and the keyway dot is at about 1,o clock and the other dot is lined up. Also if this is the way it was with the other cam is it a match to the cam or will also work with mine. I think I understand they are advancing the timing 2 deg but I can,t get it in my head I,am so used to the crank keyway being straight up, any help on this, I,AM ready to put the motor in as soon I figure this out.