Hotchkis Sport Suspension 16391 Tie Rod Sleeves for 1963-1972 Chevrolet and GMC C-10 Pickups. Enhance steering precision of your 63-72 C-10 Pickup with Machined 5/8" Thread Hex body Tie Rod Adjusting Sleeves included Jam Nuts and are finished in durable gloss black powder coat. Features 5/8" thread bodies with a length of 6.5". 71-72 trucks have larger tapered inner tie rod ends and will be required to buy 65-70 inner tie rods to accommodate the Hotchkis center link. You can purchase the 5/8" inner tie rod from your local hardware store (Napa P/N ES370R or equivalent). You will be using the included Hotchkis 5/8" to 11/16" tie rod sleeves. These will adapt the inner 5/8" thread and the outer 11/16" thread. Trucks using a 73-87 late model conversion spindle will also be using the included Hotchkis 5/8" to 11/16" tie rod sleeves. Trucks using a 63-70 disc brake conversion spindle utilize the 5/8" outer tie rod ends and you will need to purchase Hotchkis kit #16391 which has the proper 5/8" to 5/8" tie rod sleeves.