LS1:
457.6 lbs, LS1 auto; 497.2 lbs, LS1/LS6 manual
BBC & SBC
From Chevy2only;
http://www.chevy2only.com/index.php...N_position=54:8
Weights are from carb to oil pan with HEI dist, harmonic balancer, and iron water pump.
SMALL BLOCK
All iron small block 520 lbs.
Alum heads w/iron small block 480 lbs.
All alum motor 389 lbs.
BIG BLOCK
All iron BB 754 lbs.
Alum heads with iron block 660 lbs.
All alum BB 501 lbs.