Ill give the real recent deal. Yesterday, I just removed the 440 out of my e body, after years of doing it from the top
Its not as easy as some would say, but there are some advantages
From the top:
1. I hate taking off and reinstalling the hood. That sucks
2. Reaching all tranny bellhousing bolts
3. Realigning the tranny with the engine (manual) and rebolting together: Sucks, tight fit
4. Most cherry pickers just give enough room to clear the front
Form the bottom:
1. I have a 2 post lift. NO WAY I would do it without one
2. You will have to realign the car when done. Yes, you can scribe the K member mount, but I would still realign
3. I can see now what a ***** it will be to level the engine /tranny/k member combo when it comes to mounting back on frame. No matter how well I made the stand for the combo, it will be real ***** to level a 1000 pound combo. Ill need about one, two other guys to help
4. Headers and starter had to come off first before removing
5. Detail k member, rebuild front suspension now if needed
But all in all, remove from bottom seems easier, but ONLY if you have a 2-4 post lift