I just gave my 74 SE Charger, 318, stock rebuild with a mild RV cam and ported 302 casting heads a timing adjustment. It was doggy at higher RPMs set at 0 degrees. I added 10 degrees initial and it woke up with a little more power and much better higher RPM performance. (no tach)
The distributor is original and not in the best condition. I could tell the advance mechanism was sticky.