Holden V8 engine stand dimensions

Hi guys, I'm looking for an easier way to move a Holden V8 engine and box about other than the pallet on wheels its sitting on at the moment. I've got an extremely sturdy trolley that I mount ute tray bodies and bare cabs, morris mini shells etc onto for repairs that I'd like to weld or bolt some brackets onto so I can bolt the motor and box into this and push it around.

So has anyone built an engine frame to mount a Holden V8 onto in the past or owns one now that can tell me the necessary dimensions between the engine mount brackets and also possibly the engine mounts to the rear gearbox mount?

Maybe even just a measurement between the mounts on a bare crossmember even? which should be able to give me a starting point.

Cheers Pete