The actual reason they were removed from AD was so the a/c could be lifted up over the airport fence and swung onto the barge.

Intrepid have 2 of the engines, the other 2 were still at JFK the last I heard.

FB in germany and AA in the UK also had their engines dropped out before being transported.

All the others still have them. CofG is not a problem, all the museums were required to put 3T of ballast in the front hold, in service the ballasting was done with fuel.

AB at LHR was used for a while in 2002 to ‘store’ engines, as she had been de-fueled the old high life mags were put in there, but now with no engines she sits a little bit more nose down than she should