Firing Order for a 340

Pull out number one spark plug, have buddy stick finger in the hole. Bump the engine over slowly till it pushes your buddies finger out of the hole. Your very close to TDC check the balancer and use a socket and big bar to get it to ZERO on the marker with the line on the balancer. that should be TDC #1. see where your rotor is pointing, lift distributor out of the motor and re drop it to #1 if its in correct.