Shipping cyl heads

Planning on shipping a set of cast iron heads off to have some upgrades done, whats the best way to package them? Any recommended carriers, fed-ex, ups?
Thanks,
Sheldon G

https://www.460ford.com/forum/40-engine-build-archive/102740-packaging-cylinder-heads-shipment.html

STR-LGL-70 wrote:Planning on shipping a set of cast iron heads off to have some upgrades done, whats the best way to package them? Any recommended carriers, fed-ex, ups?
Thanks,
Sheldon G

Make a wooden box for them and send them via freight.

Thanks Randy,
Ended up going another direction, bit the bullet and picked up a set of used C heads with WW rockers, rotating assy etc, Basically everything except carb & block.