I know it's a far stretch from happening. But my cousin bought an RV that didn't run due to some old holley fuel injection issues. We slapped my old Q-jet on it and drive it home. I can't remember the exact mileage on it. But it was less than 25k miles. And it's a 6 digit odometer. So it has 25k or 1,025,000k miles! Hahaha. The RV is in great shape but being so old it's very outdated. We were going to pull the 454 and shove it in a short wide truck. He sold it and turned to the dark side and bought a dodge... He's looking for a 360/727 to replace the 318/904 in the dodge now. He will take a big block if its a complete engine and trans. He plans to buy something in useable condition because its a truck.. Not a hot rod money pit. Lol. But he would like to trade the 454 for something if possible since he doesn't have much use for it. I have no idea about the casting numbers on the block or heads. It's still in the RV waiting to be pulled.