1959-75 Ford F250 (Highboy) w/Standard Duty Dana 44 (8 Lug, 3/4 ton 4×4) front Drum-to-DISC BRAKE CONVERSION KIT (w/Closed Knuckles) This Kit is for a Standard Duty (3300 LB Axle) 4×4 Ford F250 3/4 tonwhich has 8 Bolts at the Ball Seal behind the Knuckle.(for 3300 LB Axle or Less)Dana 44 w/Closed Knuckles8 Lug Wheel Bolt Pattern. SPECIAL NOTE…READ BEFORE YOU BUY: This Kit works on Standard Duty dana 44 only. Look behind your knuckle to see if you have 8 bolts at the ball seal or 12 bolts. 8 bolts is Standard Duty dana 44 + 12 bolts is Heavy Duty dana 44 THIS KIT IS FOR STANDARD DUTY DANA 44 ONLY. NOTE: Will not fit Ford HD 3500 LB Axle or Dana 50/60 Axles.See are Listing for the Heavy-Duty Kit w/12 Bolt Ball Seals.