Billy, those two bolts you see are where the block was attched the the "J bar" on the assembly line. The J bar supported and moved the block along the line. It was nothing more that a large bar shaped like a "J" the block was attached to. If you look most FE/FT blocks have those holes. The early 427's that used the J bar needed to be taken off line for crossbolt installation making them a PIA to assemble. Those two bolts can most likely be removed. Unless someone machined them to go through the block to simulate crossbolts which would be just silly. Also the CF logo is the one for the Cleveland foundry and I'll decode the casting clock asap. I'm a little rusty on casting clocks LOL. G.