440X had some oddities to it that made them different. Not sure if this applies to the 1978 aluminum 440 machines for the factory team, or the ones built for independents.
Brake disc: Tolomatic, Inc. Part #33011003 Disc, 7.75 (O.D.), 3.0 (hole size), .119 thickness.
Tie Rods are 5/8 thick aluminum, with 3/8″ right-hand threads on one side, and 3/8′ left-hand threads on the other side. The Recoil side tie rod is 17-5/8″ long, while the clutch side is 17-1/2″ long.
The two Recoil side radious rods are 3/4″ O.D., with a 7/16″ left-hand thread on one side and a 7/16″ right-hand thread on the other side. They are made of aluminum. The top one is 14-1/4″ long, while the bottom one is 12-1/4″ long.
The two clutch side radios rods are made of magnesium, and are 3/4″ O.D., with a 7/16″ left-hand thread on one side and a 7/16″ right-hand thread on the other side. The top and bottom one are 14″ long.