I did that three times and put it back in 3 times after noticeable vibration..o well.
My changes? Removed the spare and jack, lug wench and board from trunk and replace with a can of fix o flat. Remove the vert top motor and hydraulics, a/ccompressor, lines and condensor, smog pump, egr (still weights something lol), strut tower bar, old heavy cats replaced with new true high flow lighter ones, 50 pound lighter aluminum heads. Total = about 175-180# give or take ...
The speakers and radio weight very little, you could remove them though. Let's see what else..
O' yea, remove rear seats (about 40#), dog ring metal thingy under rear (7 pounds), go to dumps ( I have heard 20#), seat motors(?), center console(not worth it), entire top apparatus ( Me thinks 100+#), get a new lightweight k-member and a arms..80#?