6 pac piston rod and pin Piston 920 Rod 901 pin 251 440 stock pin 223 Stock 68 440 piston rod pin together 1932.5 6pac together 2071.2 68 piston 866 pin 223 Those 866 pistons came out of a 74 440 motor home block had 6 pac rods and steel crank and internally balanced, regular balancer.
