Big Block and Power Steering

I appreciate the information.

I am not to sure of the differences. but I know when you look at the vendors that reproduce the power steering pump bracket, they make it appear that the water pump housing changed sometime around 69. Or maybe that is the time that they switched from the TRW pump to the federal pump? Im not to sure... But I do know that I have a 1970 block and water pump housing in the car.

I appreciate the offer for pump cores. I got one and I am going to the post office to pick it up today.