Disco 1 Drive shaft replacement problem

Hi all I can't get my drive shaft bolts out.
Am I missing something. I've tried taking the large nut off pictured bu I was turning the engine over and then I wedged my trusty 14 spanner in and just started bending it / lifting the transfer box up.
Any clever idea would be appreciated, as you can see the bolts are dead so need removing.
Thankyou

Engage diff lock first perhaps, when I had to remove a rear diff flange, I had to put a trolly jack under the socket bar to crack loose the nut, it very nearly started lifting the vehicle, the nut it torqued up quite high.

Aslong as its just a case of try harder, I stopped when things started moving. Time to break out the jumbo breaker bar!

Shame you don't live a bit closer cos I've got an impact gun you could have borrowed to get it off with