C7TE-A yep long rods for the 352/360 and would be original. All the date codes sound right for number matching. Don't sweat the block casting numbers. Many of them didn't have them anyway. All the numbers you see on it are just part of the mold numbering system. DIF is just the Dearborn foundry logo. .030 should be no problem for cleanup. If your anywhere near Barry who posted above get in touch with him. He's one of the best FE guys out there. www.survivalmotorsports.com