I'm building this lt1 to go in my 84 blazer 4x4. I got it in boxes so I did not take it a part to know anything about it. I noticed on the pistons that there is a b then an arrow mark on them. I figure that the arrow goes forward but not sure about the b? Also the rods at the main cap are flat on one side and rounded on the other. I do not know if the rounded side goes to the inside or outside? Please help!