1964-1972 Skylark Pro+ Brake System Front 4301336FR valve-covers Stock rear springs are progressive

Stock rear springs are progressive whereas the Dinan springs are linear

1996 - 1998 Buick LeSabre

6 V8 1977 - 1986 Chevrolet K20 Suburban 305/5 V8 1968 - 1973 GMC C15/C1500 Suburban 307/5 V8 1968 - 1973 GMC C25/C2500 Pickup 307/5 V8 1969 - 1974 GMC C15/C1500 Suburban 350/5

Buick Park Avenue (1996-1998)

1964-1972 Skylark Pro+ Brake System Front 4301336FR valve-covers Stock rear springs are progressiveFits 1964 72 GM A Body, 67 69 F Body & 64 74 X Body Cars w OE Spindles (Also fits DSE, Heidt's, Fatman, Ridetech & L&H Drop Spindles) Features: 2 Piece, 6 Piston, 6P Caliper Manufactured in Phoenix, AZ CNC Machined from US Sourced Forged or Billet Aluminum Powder Coated Finish Stainless Steel Pistons, Abutments and Noise Suppression Clips Staggered Pistons to Minimize Uneven Pad Wear Dual Seals, Dust Weather & Pressure 2 Piece Slot, Drilled, Zinc