I weighed my 472 on: March 02, 2004, 

I have read from several sources that a caddy 472/500 weighs 600 lbs,
a SBC is 575,and a BBC is 680. Well, after wrestling with 3 engines this
past weekend I am not so sure. My friend and I trailered a chevy 4.3, a
chevy 350, for him and a '69 caddy 472 for me. Loading and unloading the
4.3 was cake, the 305 wasn't bad, but after stepping on my nuts heaving
the 472 around, I question that 600 lb #. 

I don't know If we were intimidated by the sheer size of it, or it really
is a lot more than 25 lbs heavier than a small block. 

So I weighed it. Complete '69 472 air cleaner to oil pan, fan to flexplate.
All weights are in lbs. and include the bolts, etc. for that part. 

Block-------------------------------------------- 210=95kg
Crank w/hub--------------------------------------- 78=35kg 
pistons/rods,bearings---------------------------- 30=13,6kg
Heads w/valves, springs------------------------- 125=56,7kg
valve-train-Cam, lifters, pushrods, rockers, chain, gears 
---------------------------------------------------27=12,2kg
cast iron intake --------------------------------- 43=19,5kg
oil pan,pump,pickup------------------------------ 14=6,3kg
valve covers--------------------------------------- 7=3kg
water pump, plate--------------------------------- 10=4,5kg
flexplate------------------------------------------ 5=2,3kg
fuel pump----------------------------------------- 2=0,9kg
motor mounts--------------------------------------- 7=3kg
distributor, coil, wires--------------------------- 7=3kg
exhaust manifolds--------------------------------- 31=14kg
balancer, pulleys, brackets, belts-----------------15=6,8kg
alternator---------------------------------------- 10=4,5kg
power steering pump------------------------------- 14=6,3kg
air pump------------------------------------------ 10=4,5kg
cooling fan--------------------------------------- 6=2,7kg
Q-jet carburetor, dashpot, choke spring----------- 10=4,5kg
Air cleaner--------------------------------------- 5=2,3kg 

Total--------------------------------------------- 666 lbs.= 302kg 

there was no A/C compressor 
ready to run- carb to pan,w.p., cast iron exh. manifolds- 599 lbs.=271,7 
use alum intake (368-- 17lbs)---------------------------- 573 lbs. =259kg
take off exh. manifolds---------------------------------- 542 lbs. =245,8kg

599 lbs. is without any front accessories, motor mounts or air cleaner. 
666 lbs. is complete, just as it came out of the car.