Yeah, I had been all over google for hours before I posted. Finally found this:
Weight of 5.3 LM7 (iron block) 518 lbs fully dressed and wet
Weight of 4L60e transmission 195 lbs wet.
I'm trying to figure how much weight I lost when I replaced the old drive train in my Suburban. All I need now is the weight of the old 3 speed manual.
By the way, the old 235 I6 was 630 lbs.