If, and a pretty big IF---the block is rare, hard to get, nothing else available, then sleeving all 8 cylinders is maybe the only option--I once sleeved one of our 392 hemis in all eight holes just to find out if it would work--we named it Metullsa??(snake headed goddess?)

We used it just as a qualifying engine at the drag races so we could go into the first round with a fresh motor---when we worked on it , the sleeves were so loose that they would go up and down with the pistons as we put it together or took it apart.

But for a small block chev guy wanting the bigger bore of the 400----4.125, Dart has the SHP that comes .010 under that to finish hone to 4.125 or of course go bigger, and they are reasonably priced