I bet there are threads on here about it, if not elsewhere on the net.
But one thing I have heard is that it is better to take the transfer box off first as it is heavy and awkward. Do you have a second pair of hands to help? That is more or less essential. Well maybe only for an automatic.
The member on here that I asked about it sadly no longer contributes, but he told me to jack up one side and use an engine crane to hold it then lower it. Balancing it on a normal jack is asking for trouble. But that was with mine which is auto.
So how high are your high ramps?
I'll try and do a search to help you.