Yes, I had the 452 heads redone. 7 cylinders looked like new (low mileage engine), but the 8th cylinder had rust as water sat in there (my improper storing... :( ). I honed it, and put new rings on and it's ran a bit in the magnum since. Truth is, I love both small block and big blocks, but generally favor the small block because I have the most parts for them, most experience with them, and they fit everywhere better, not to mention much more common to pick up. BUT..... I'm not looking at this as a Big Block vs Small Block. I'm seeing the truck as a peanut butter and jelly build, yet I want to keep improving the ET. So, I'm seeing this as a very low cost to gain 80 cubes, but will the 80 cubes in THIS particular situation pay dividends... LOL (do I ever receive dividends??? LOL) .