Eh, the way I see it... you need to bore the block out anyway, which means machine work + new pistons. If you're doing the machine work on the block you may as well get your head worked over too. Since you're getting new pistons, you'll likely be getting new rods with it and you'll need new bearings with all of this. Also, you may need to machine your crank if it was damaged.
At this point, you may as well throw a whole new engine in there IMO.

Quote Originally Posted by nynco View Post
DfBrews... whats the story on that piston crown. I have never seen a design like that. I am referring to the cone and what looks like a strange internal pocket around that. Is that to create some type of swirl to better the burn?
Use your google fu. Search for things related to diesels and high-compression racing engines. The information is out there and easily accessible.
Basically, yes, it helps to swirl and mix and compress the air-fuel mixture. It also has to to with the combustion chamber itself, but google will explain all of this to you.