Holley #3247 / 3886101 . This is an original Holley #3247 manufactured in 1969 (983) to original specs. Slotted screws, Correct fuel blocks #4901 and #4519. Nice original patina. As used for Corvette 1966 L72 427 425 / 450HP engines. Rebuilt, tested and run on engine. $600.00 plus shipping.