I had to do a few measurements during my 350 rebuild and came up with the following weights:
350 Cast Iron block (empty) = 155 lbs.
Cast Iron heads (complete) = 45 lbs./ea.
Aluminum heads (complete) = 25 lbs./ea.
Crank = 50 lbs.
Aluminum intake manifold ('86 Vette) = 15 lbs.

I'm simply calculating weight advantage that my vette motor has over a standard 350 engine and I thought someone else might need these numbers.

 

Thanks johhny, I never knew the 350 weighed that much, I though a bit more.

 

I know. I had to lift it out of my truck by myself. Whoa!

 

sb weight 500 pounds

 

Sure, with everything on it. I just needed to break down the components so I knew how much lighter all my aluminum parts were compared to the cast iron.

 

Obviously, I left out the cam, lifters, rocker, rod, pistons, carb, exhaust manifolds, harmonic damper, pulleys, water pump, flywheel, etc.

 

yes a complete sb is 500 and a BB is 750

 

I can believe that. Those BB head gotta weigh at least 80 lbs./ea