I always have heard stories of how my grandpa would hook Oliver 88's together, but that was way before my time. A few years back my dad hooked a JD 4555 together with a JD MFWD 4250. We were pulling a 15 ft twisted shank chisel plow about 15 inches deep around 6 mph. It worked out pretty well, both tractors had 466's and 15 speed power shifts. We used an 8 row buffalo Cultivator toolbar to hook them together.

The 4250 went on the front and the 3 point just lifted the front tires of the 4555 off the ground. He had linear actuators on the clutch, throttle, and gear shift. He also switched the 4555 over to solenoid shutoff and put the kill switch in the 4250 in case things got out of control.

 I wish I had pictures of the inside  of the cab, this is all I could find though.

Devin