Digging out more parts I have 3 oil pumps. First pic is all 3 together. From left to right the original truck block oil pump, middle 350 small block(seized and a paperweight) right is one I got from Ricky when I got his oil pan. Next 3 pics are left to right with the cast numbers. Question is why is the right one so much bigger than the other 2? Pick up tube is a lot. Higher on the pump too.