I just had one in my car. its an 01z28. I decided to sell it and buy a ck performance AOD. The guy i sold it too loves it and he doesnt mind the extra weight. I should have the AOD in the car next week .
4l80 weighs in at 260 #`s
There is a shift kit available that removes all computer controls and makes it a manual valvbody. So you dont have to have the computer control if you dont want it. Just some info if anyone cares.