I'm looking at a block, my car that was born on Dec 11 or 12th 1963 ( I think)serial number 40867S107354, the numbers on the block are as follows; 3782870, dated K143, has a GM and a 4 by these numbers and something I dont understand - it has "Fuller" stamped there as well. On the front stamp plate it has F1116R. Is this the "right" block for my car? Someone said it was a crate motor??