Tuff Country P/N 97000 block kit includes lift blocks and u-bolts designed to raise the rear of your GM Truck/SUV. Installation is done by inserting the cast lift blocks between the factory rear leaf springs and axle. Extended zinc plated rear u-bolts designed specifically for the GM Truck/SUV are use to replace the factory u-bolts.
Details:

• Rear Block and U-Bolt Kit
• Lifts the rear of your vehicle 3 inches
• Maintains a factory ride
• Custom made for the application
• Lift blocks are constructed of heavy duty cast iron
• Blocks are tapered to eliminate or reduce driveline vibration
• Zinc plated corrosion resistant extended u-bolts
• Simple Bolt-on Installation
• Made In The USA
• Sold As A Kit

Fits:

• 1969-1972 Chevrolet Truck 1/2 Ton/3/4 Ton 4WD
• 1969-1972 Chevrolet Suburban 1/2 Ton/3/4 Ton 4WD
• 1969-1972 Chevrolet Blazer 1/2 Ton/3/4 Ton 4WD
• 1969-1972 GMC Truck 1/2 Ton/3/4 Ton 4WD
• 1969-1972 GMC Suburban 1/2 Ton/3/4 Ton 4WD
• 1969-1972 GMC Jimmy 1/2 Ton/3/4 Ton 4WD

Installation Notes:

• On most applications factory length shocks must be replaced with extended length shocks when installing rear blocks 2 inches in height or taller
• Designed for rear axles only. Never use lift blocks with a front axle

Tech Specs:

• Amount of Lift: 3 Inches Rear Lift
• Blocks Tapered: Yes
• Lift Block Dimensions: 3 Inch H x 2.5 Inch W x 4.75 Inch L
• U-Bolt Dimensions: 5/8 Inch x 2.75 Inch x 12.875 Inch - Square
• Includes: 2) 3 Inch Cast Iron Lift Blocks, 4) Rear Axle U-bolts, 1) Hardware Bag (nuts and washers)