Dodge Repair Questions? Ask a Mechanic for Answers ASAP
To set the timing on your cammed 340 you will need to disconnect the vacuum advance and plug the line as you said then start with 10 deg BTDC and see how she reacts. Aftermarket cams will usually like more timing than the stock setting but seem to work well right around 10 - 12 deg BTDC. Make sure you idle is set where you want it when setting the timing.