Help on choosing a stall converter

Got lots of questions..I have a 68 cuda,360 with J heads,headers,MSD ignition,accel super coil,still have the cast intake with a 600 cfm edlebrock,& 727 tranny.I ran 14.6 last year,never had a good take off,going to put a converter in it,but don't want nothing to radicle on the street..Any help would be great...thanks...Bob