LA360 compression
One thing that I don't think has been mentioned is the rods. If a story was told about the pistons, then I would want to check if new rod bolts were used and rods rebuilt. This is likely why builder mentioned stroker- buy the rods and pistons and you are most of the way to the cost of a cast crank stroker bottom end. It
If you are interested I will make you a good deal on a all new stroker kit I have.