Hi,

It should be a very easy swap... just dont forget defender´s dont have an wastegate modulator on the turbo, so you should the one form old engine

If it was me, I would run then new engine 1000kms with new oil and filters and then change them all again

When all is ready, make some fuelling readings of the new engine with the nanocom and email them to me... I will see if everything is running like a swiss watch

Regards,