Motor outside dimentions

I'm looking to secure a metal box to ship a Norton Commando motor. I don't have access to the motor at this time. I am planning to use an engine stand for the bottom of the motor and an attachment to where the head steady bolts up to. Does anyone have the Height, width and depth of the motor handy. I've looked in books and on the internet, but with out success.

21" High x 16" wide x 12"depth Mk3 engine dimensions. 15" wide if a pre Mk3 engine.

Thank You. This helps alot.