Gearbox swap.....engine left in gear

Gday everyone,i think i might have made a very stupid mistake here,i was removing my gearbox from my hilux today,got everything off and it is just sitting in place, however i realised that the engine has been left in gear......will this stop me being able to remove the g/box as the engine is still engaged with it? if this is the case is there an easier way to fix it rather than having to put it all back together?