i have a 76 that ideals good but when i put it in gear and try to take off it starts running really bad un till about 3200 rpms.i put new cap,rotor,and plug wires,and plugs in it.the car rev up fine when there no load on it.with aload it back fire and hesitates.if i rev the car up to about 3500 rpms and let the clutch out slow it is ok till i go to shift gears.i think the car is still runing a little rich to.thanks ahead a time. freez