Water Pump Housing

Better make sure what your doing. The cast iron pump is for up to 69. The lower hose is on the driver's side. Aluminum pump is passenger side. I think you need to change the timing cover and balancer to the later style. AFAIK, there are 2 different aluminum pumps. Standard, and police. Standard has holes around the WP shaft .They are known for breaking. The police style doesn't have that, and has a larger shaft to keep from breaking.