tbran
Guest
you have the most experience!, the late black heads were lower profile and higher speed. I remember adding a Gleaner kit to a corn head one time around '78 to adapt a FG 630 to a M2. Pretty big job best I can remember. The only big problem with the orange heads was keeping the double sprocket on the snapping roll shaft TIGHT. The cross chain was out of sight so out of mind. When worn it really whipped on the sprockets. I had about as soon have a really nice orange head as a early black one. The later series with low tin and long snouts were better though .