do the z11 rods have a part number or do you just go by lenght ? I met a man who has some 409 parts , and the rods only have what looks like 4104 on top of rod on piston end , they do measure a little longer than 6 1/4 in lenght , he also had a cam ground to z11 specs , a nice harmonic balancer and crank pulley , no part number on balancer , the pulley is the 533 ,
