I have a complete 1978 454, just purchased in running condition in 3/4 ton truck. I bought it hoping it would be a 4 bolt main, but its a 2 bolt. I need a 4-bolt for my high stress marine application, so this one is for sale. Very clean inside, actual mileage unknown, odometer reads 50K, connecting rods are stamped as if it has been rebuilt. Edelbrock intake. $650 firm, delivery available for small fee. Its out of the truck and ready for your inspection. Email for more info or call Dave @ 5zero4-7two44. Thanks.