Shipping cylinder heads

Make A tight box out of heavy duty corrugated/cardboard box . make another tight box around the first. Do that for each . Send them separately . USPS.. I usually go to U-haul and get heavy duty boxes to cut down if my son doesn't have head boxes that he gets heads in.

If you know a local machine shop ask them for head boxes or crank boxes. UPS or Fed-ex may ne a little cheaper