Crank Pulley/power Steering Pulley Alignment

[sanchez]

I've had a new engine put in my car approx 5000k's ago and since then I've snapped two p/s belts due to the crank pulley being a few mm closer to the firewall than the p/s pulley. I know the p/s pulleys can be adjusted laterally but do they also go for/aft as well? Maybe an option would be a small spacer washer put on the crank pulley?? Thanks.