Seller's Craigslist description...
"I have a standard Mo 1968 Camaro Z28 Block. Comes standard with its main caps. Pictures will tell the numbers and details. 1100 ... email if interested.... These blocks are impossible to find and even harder to locate a standard bore block. 3914678 V0404MO 18L338058"
P.S. Ed, can you change the topic to 8L338058? (it's 8N338058 now)