BRAND NEW CORVAIR 140 GM MANUAL REVERSE STEERING GEAR BOX WITH 20:1 STEERING RATIO FOR THE APPLICATIONS LISTED BELOW. THESE ARE BRAND NEW GEAR BOXES PRODUCED BY SOUTHWEST SPEED INC. THESE SOUTHWEST SPEED STEERING MANUAL BOXES ARE PERFECT FOR THE STEERING SYSTEM IN HOT ROD APPLICATIONS WITH STRAIGHT AXLE SETUPS: INCLUDING STREET RODS, RAT RODS, HOT RODS, T-BUCKETS, MODEL A, 1923 - 1948 FORDS, AND MANY OTHER VEHICLES. THESE BOXES ARE CONSTRUCTED OF MODERN HIGH STRENGTH STEEL AND NEEDLE BEARINGS TO ENSURE DURABILITY, WHICH ORIGINAL BOXES JUST CANNOT OFFER. NOTE: THIS CORVAIR STEERING BOX IS NOT ADJUSTED AT THE FACTORY AND THEREFORE, IT IS NECESSARY THAT THE STEERING BOX BE ADJUSTED UPON INSTALLATION PER THE INSTRUCTIONS AS PROVIDED ON THE INSTRUCTION SHEET. FEATURES: MANUAL REVERSED STEERING GEAR BOX NEEDLE BEARING DESIGN FOR LONGER LIFE STEERING SHAFT SPLINE: 5/8"-36 20:1 STEERING GEAR RATIO 5 1/2" TURNS (LOCK-TO-LOCK) RECOMMENDED FOR VEHICLES WEIGHING 2800 LBS OR LESS FITS: THESE BOXES ARE PERFECT FOR HOT ROD APPLICATIONS WITH STRAIGHT AXLE SETUPS: INCLUDING STREET RODS, RAT RODS, HOT RODS, T-BUCKETS, MODEL A, 1923-1948 FORDS, AND MANY OTHER VEHICLES: YOU CAN SEE A BETTER DESCRIPTION OF "CORVAIR BOX CENTERING INSTRUCTIONS" IN THE DIAGRAM TO THE RIGHT OF THE PAGE STEERING BOX SPECIFICATIONS: 20:1 TURNING RATIO 5 1/2 TURNS LOCK TO LOCK INPUT SHAFT: 5/8-36 SPLINE OUTPUT SHAFT: 36 SPLINES THAT TAPER FROM .844" TO .890" INPUT SHAFT IS REVERSED & TURNS CLOCKWISE INPUT SHAFT DIAMETER: .625" OUTPUT SHAFT LENGTH: 1.15" OUTPUT SHAFT TURNS COUNTER-CLOCKWISE LOOKING STRAIGHT AT THE END OF SPLINES OVERALL HEIGHT OF BOX: 5 1/2" OVERALL WIDTH OF BOX: 7 1/2" OVERALL LENGTH OF BOX: 7" BOX HAS A SWELL IN THE CASTING THAT EXTENDS PAST THE MOUNTING LEGS THAT IS AN ADDITIONAL 1/4" NOTE: HAS A 3 BOLT MOUNTING FLANGE. FROM MOUNT HOLE CLOSEST TO THE INPUT SHAFT TO HOLE CLOSEST THE OUTPUT SHAFT IS 2-15/16" FROM THE SAME HOLE CLOSEST THE INPUT SHAFT TO HOLE OPPOSITE OF OUTPUT SHAFT IS 3 3/4". THE REMAINING DIMENSION BETWEEN THE TWO HOLES FURTHEST FROM THE INPUT SHAFT IS 2-15/16". STEERING WHEEL RATIO SPECIFICATIONS: 8:1 TURN STEERING WHEEL 8 DEGREES: PITMAN ARM TURNS 1 DEGREE 12:1 TURN STEERING WHEEL 12 DEGREES: PITMAN ARM TURNS 1 DEGREE 14:1 TURN STEERING WHEEL 14 DEGREES: PITMAN ARM TURNS 1 DEGREE 16:1 TURN STEERING WHEEL 16 DEGREES: PITMAN ARM TURNS 1 DEGREE 20:1 TURN STEERING WHEEL 20 DEGREES: PITMAN ARM TURNS 1 DEGREE 22:1 TURN STEERING WHEEL 22 DEGREES: PITMAN ARM TURNS 1 DEGREE NOTE: FOR A BETTER EXPLANATION: 360 DEGREES OF ROTATION ON STEERING WHEEL EQUALS 18 DEGREES OF MOVEMENT ON THE PITMAN ARM OR SHAFT. 360 DIVIDED BY 18 EQUALS 20 TO 1 RATIO. YOU CAN VIEW AND DOWNLOAD THE COMPLETE INSTRUCTION BOOKLET FOR THIS STEERING BOX HERE.
