1975-1985 Chevy Silverado, GMC Pickup 1500, 2500, 3500, 454 BBC, Factory Original Big Block Chevy, GM part Upper #14015434, Lower # 14015389, NOS brackets, fit alot of different Chevy Big Blocks 396, 454, 427 motors. S&H is $16.80 to the lower 48 states only!!