Hey...Mr.Perfect...haven't you made a syntax error in your life?You are only publicising your childish mentality by writing what you wrote.
I stand corrected..the DC-63 never got built, but there were plans for it with RR engines and B.A. had expressed interest.I meant DC-10 series 10,30 and 40...IF THAT WILL SATISFY your bloody mindedness.Yes we do know that DC-8 had a series 63, and perhaps with an engine transfer on the DC-10 you would be the ace test pilot to fly it...and use the other spare engine as its APU stuck aptly...in YOUR tail!