Came across this dual quad poly casting number is 2264370 on the front pass side of the block. I can not find a date code like a later motor has. How can I tell if this is an original dual quad motor? The reason I ask if you look at the photo it does not seem to be messed with it looks like the intake has been on it untouched as the rest of the motor for a long time. Any help from a knowledgeable poly-guru would be greatly appreciated