Chugalug (#9724) and Hempy,
Yes, the two-seat P-40 would be a post-war mod, same as the Spitfire. With no experience of the "Mk.IX(T)" (and far too decrepit even to climb in), still cannot imagine that it could handle anyway like the original - which was the sweetest thing that ever flew IMHO.
I suppose the idea was to sell it as an advanced trainer (cheap, for sterling) to compete with war surplus Harvards (plentiful, but for US dollars, and nobody had any of those). At that, I think only the Irish Air Force (that figures !) and the IAF nibbled.
As the Harvard was nastier than the Spit, all the wartime chaps made the transition with ease.
Danny.