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.