Recently purchased a 65 El Camino that the previous owner had put a 350 in. The casting number (14016379) tells me it's a 77-79 crate engine. The only engine code on the front passenger side of the block is V0709800. It was built in Flint on July, 9th, great. WHAT THE HECK DOES THE 800 MEAN??? I can't find this any where! Please help.