are these turbo pistons

[321GO!]

Just to be sure, does it have the threaded hole for a knock sensor at the rear of the block? That area is just outside the right edge of your picture (post #13).

yes it does

 

[turbofabricator]

Tear it down and post pictures of block, crank, rods and pistons. We can help from there.

 

[321GO!]

.