May have screwed up installing new cam. Need help!

Depends on your timing gear manufacturer and cam manufacturer. Which timing mark are you referring to? I think most timing gears, when installing dot to dot, crank dot at 12 o'clock and cam dot at 6 o'clock puts #6 cylinder at tdc firing. So the distributor rotor should be at #6, Vibration damper mark should be a 0 tdc.