O.K. here's your sign, doing a 235 swap on a 1958 chevy 235 to fit in a 49 3100 truck, got the front and rear fitted for the motor mounts, bought a short shaft water pump from classic parts, got the water pump, generator and harmonic pulley's all lined up. The water pump comes with a spacer for it ,but the fan hits the balancer. Help please, I know, here's your sign. Checked to be sure it is a 1958 235 by the casting numbers, and block number. Tell me what I've done wrong !!!