Nice job on the crate but not enough points secured on the engine in my opinion
Having shipped close to 100 engines to date, I have definitely had a couple of bad experiences. My current steel crates that I use secures the engine in the front 2 engine mounts, 2 of the rear mounts and also at the head steady mounting holes.
Years back I shipped an engine secured only with the 2 front and 3 rears. This engine was delivered to my customer with both front bolt holes fractured and cracked.
Since triangulating the securing points I have never had any issues
I think one of the problems is that we assume that the crate/box will be handled the way we intended when we built it. There is however no telling if the box will be shipped on one of its sides or even upside down. I had a customer use my crate to ship an engine to me and when I opened it, there was oil all over the inside of the crate. Even on the top lid which meant that it had been upside down at some point...even though it has steel handles welded on the top.
Also, be aware of the UPS guidelines for packaging. According to their fine print, any box shipped with UPS should be able to handle a drop from waist high !! That's right....a free fall of about 3+ feet. If it cant handle that, don't bother insuring it as they wont cover it anyway.
I never use UPS for my engines any longer. I have had much better luck with Fed Ex as they have been far more careful when handling the large, bulky shipments. That is of course just my experience and others may have a difference of opinion.
Strapping the crate on a pallet and shipping by regular freight is a lot less risky but the costs are often so much higher that it may not be an option
Matt / Colorado Norton Works
http://www.coloradonortonworks.com