Motive Gear Ring & Pinion GM 8.5/8.6 3.42 Ratio SR42603A-SFI our keyway timing set for

our keyway timing set for Chevrolet 454-502 GEN VI Big Block is built with bullet-proof durability

Choke Plate Shaft(4150 and 4160)

1986-1986 GMC C2500 Suburban

1972-1980 Ford F-350

* The special valvetrain in the 1970 340 T/A is not compatible with these cylinder heads

Motive Gear Ring & Pinion GM 8.5/8.6 3.42 Ratio SR42603A-SFI our keyway timing set forMotive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both on and off road, check out Motive Gear. Motive Gear products can be found in the winners circle at racing events worldwide. The superior quality of Motive Gear components is the result of years of