LA 360 piston ID

lawnmower man said

There is no dome. It is essentially a flat top with valve reliefs

Click to expand...

Look around the bottom of the piston. You can see a rolled edge.

Your pistons look like an older TRW domed forging that’s had the domes milled down. Thats why I said just measure the piston above the valve notches. That’s the part that matters.