If you can get the front up on jackstands, you can drop the front of the subframe, loosen the back and let it hang. That tilts the engine forward enough to shift the A/C compressor out of the way and squirm the alternator past it out the bottom. I've heard of guys squirming it out from the top by either loosening the radiator supports or dropping the back of the subframe, but that's hearsay and not how we do it in the shop.
Thanks I might give that a try
Lots of things could go wrong with me pulling radiator lol
My repair skills are from when alternator was at least where you could see it
Done Nissan Quest several times but had a little more room