4.44 swap is pretty simple. The transmission is a direct fit..the rears, you need to take apart and swap the 4.44 ring gear onto the svx lsd, then drp the whole thing into the 4.44 case.
if its your first time working on a suby, and you have limited tools and are working in your driveway, this will take a solid weekend. If youve done it a few times, and you have access to a lift and a helping hand, itll take 3.5 hours