Because of the large diameter bearing retainer used on the O.D. 4, the shift fork pivot had to be moved out away from the transmission centerline. This makes the fork longer from the pivot to the end of fork which contacts the throwout bearing retainer. The fork was made longer to lower the force required to actuate the clutch.
You need to get a fork from an O.D. 4 transmission application. Sounds like you may have one and it's thrown the geometry off. You may need to modify the torque shaft.
Bob
AAR 4-speed 3.91, Tor-Red;
70 440 6 pack Roadrunner 4-speed 3.54, Plum Crazy;
68 Formula S conv 383 4-speed 3.23, Electric Blue;
69 Barracuda conv Slant 6 OD4 2.94, 71 B5 Blue;
78 Lil' Red Truck, Red;
70 Challenger S/E. 505 6 pack, Passon 5-speed, 3.55, B7 Blue
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