so im staring at this crow timing chain kit for my car, and its confusing me. it has mutli keyways to allow 2 degree advancing or retarding, but i cant work out how to use them. for a 304, if i installed a cam in the usual 9 links dot to dot position, how do i go about advancing this 2 degrees? do i put the crank gear on so that it is on the +2 keyway, then fit the chain so that the +2 is 9 links away from the dot on the cam gear? im trying to dial the cam in myself, but the dial indicator is confusing the hell out of me, so i might just fit it 9 links +4 degrees advance