ok, this is how it works - or does not, as i came across quite a few troubled owners that attempted much less years difference swap - and failed.
2001 powertrain is controlled by ECM, TCM, and BCM.
engine, transmission, and body. unless it all mates and matches, you are going nowhere,
or going with lotsa trouble down the road.
so, if you say you have it all, meaning - powertrain AND engine management systems, then the rest of it is a question of welding skills, acetilane torch availability, couple sledge hammers, prybars, and maybe few suspension brackets custom made. one or two very strong rednecks will be handy either.