A cutting assembly for an agricultural harvesting head, comprising: a first cutterbar; a second cutterbar; a knife drive gearbox (300, 400) configured to drive linear reciprocating motion of the first cutterbar and the second cutterbar, the knife drive gearbox (300, 400) comprising: a cam shaft (318, 416) extending along a rotational axis (338, 432) from a first end to a second end, the cam shaft (318, 416) having a first cam follower groove (334, 428) located proximate the first end and a second cam follower groove (336, 430) located proximate the second end; a drive mechanism configured to drive rotation of the cam shaft (318, 416) about the rotational axis (338, 432); a first output shaft (308, 412) indirectly coupled to a first cam follower configured to travel in the first cam follower groove (334, 428); and a second output shaft (308, 412) indirectly coupled to a second cam follower configured to travel in the second cam follower groove (336, 430); wherein the first output shaft (308, 412) is coupled to the first cutterbar and the second output shaft (308, 412) is coupled to the second cutterbar, such that translational movement of the reciprocating output shafts (308, 412) results in translational movement of the cutterbars (218, 220), characterized in that the first output shaft (308, 412) is coupled to a first cam follower housing (320, 424) retaining the first cam follower, the first cam follower housing (320, 424) surrounding the cam shaft (318, 416) and being linearly movable along the cam shaft (318, 416), and that the second output shaft (308, 412) is coupled to a second cam follower housing (320, 424) retaining the second cam follower, the second cam follower housing (320, 424) surrounding the cam shaft (318, 416) and being linearly movable along the cam shaft (318, 416). a first cutterbar; a second cutterbar; a knife drive gearbox (300, 400) configured to drive linear reciprocating motion of the first cutterbar and the second cutterbar, the knife drive gearbox (300, 400) comprising: a cam shaft (318, 416) extending along a rotational axis (338, 432) from a first end to a second end, the cam shaft (318, 416) having a first cam follower groove (334, 428) located proximate the first end and a second cam follower groove (336, 430) located proximate the second end; a drive mechanism configured to drive rotation of the cam shaft (318, 416) about the rotational axis (338, 432); a first output shaft (308, 412) indirectly coupled to a first cam follower configured to travel in the first cam follower groove (334, 428); and a second output shaft (308, 412) indirectly coupled to a second cam follower configured to travel in the second cam follower groove (336, 430); wherein the first output shaft (308, 412) is coupled to the first cutterbar and the second output shaft (308, 412) is coupled to the second cutterbar, such that translational movement of the reciprocating output shafts (308, 412) results in translational movement of the cutterbars (218, 220), characterized in that the first output shaft (308, 412) is coupled to a first cam follower housing (320, 424) retaining the first cam follower, the first cam follower housing (320, 424) surrounding the cam shaft (318, 416) and being linearly movable along the cam shaft (318, 416), and that the second output shaft (308, 412) is coupled to a second cam follower housing (320, 424) retaining the second cam follower, the second cam follower housing (320, 424) surrounding the cam shaft (318, 416) and being linearly movable along the cam shaft (318, 416). a cam shaft (318, 416) extending along a rotational axis (338, 432) from a first end to a second end, the cam shaft (318, 416) having a first cam follower groove (334, 428) located proximate the first end and a second cam follower groove (336, 430) located proximate the second end; a drive mechanism configured to drive rotation of the cam shaft (318, 416) about the rotational axis (338, 432); a first output shaft (308, 412) indirectly coupled to a first cam follower configured to travel in the first cam follower groove (334, 428); and a second output shaft (308, 412) indirectly coupled to a second cam follower configured to travel in the second cam follower groove (336, 430); wherein the first output shaft (308, 412) is coupled to the first cutterbar and the second output shaft (308, 412) is coupled to the second cutterbar, such that translational movement of the reciprocating output shafts (308, 412) results in translational movement of the cutterbars (218, 220), characterized in that the first output shaft (308, 412) is coupled to a first cam follower housing (320, 424) retaining the first cam follower, the first cam follower housing (320, 424) surrounding the cam shaft (318, 416) and being linearly movable along the cam shaft (318, 416), and that the second output shaft (308, 412) is coupled to a second cam follower housing (320, 424) retaining the second cam follower, the second cam follower housing (320, 424) surrounding the cam shaft (318, 416) and being linearly movable along the cam shaft (318, 416).