Ok all, I have a conundrum (so as always I come here). I am attempting to find the block casting numbers on my engine. I have looked and looked, taken pictures since it is soo hard to see back there. I know it is supposed to be behind the left head, I am just not seeing it or any sign of it even. I realise that is could be covered up with muck, but I would expect to at least see a hint of it. NOTHING. I can see where the throttle linkage comes through the fire wall, I can see where the spark plug wire loom attaches to the back of the head. I just cannot find the casting mark. Any help would be greatly appreciated. My engine has the fromt motor mounts and the bosses for the sides. The stamp under the head is readable. F032IDK I have found out that that indicates at least 59. Could the casting number be in a different spot on later engines? what years had both the front and side mounts? Thanks as always for the assist.