69 340 problems

Thanks to NiceFish for jogging this nugget loose, and I really hate to get off it for nothing. To find out if your chain is shot without a teardown you will need a breaker bar and a 1 1/4" socket for the crank nut. Pull the distributor cap and turn the engine over by hand while watching the rotor in the distributor. Turn the engine about 2 revs and then rock it back and forth about 3 or 4 times. You can feel the slack while you are turning the engine back and forth if the chain is really bad. To make sure, watch the rotor and if it does not turn in step with the crank the chain is bad.