Ok I’m currently rebuilding this 71 Lincoln 460 engine. I plan to place it in a ‘74 4x4 f-250 when done. I’ll change cam and lifters, the old one was busted because 1 valve was sticky. I’m at the stage where I would bring it to the shop for cleaning and magnaflux. Although, I’d like to have an idea on what to expect, here’s the pic of the crack... you think its repairable? There’s also a piece of block missing close to distributor gear, not sure if it can affect oiling of the gear.