Hey smart engine guys... can you help me?

Approxiamate weights were 340-520#, 383-620# and 440-670# but that changes significantly with aluminum manifolds and headers. I've never heard of a 440 aluminum block, there was the Donovan Hemi (I think is was a 417) and of course the Keith Black Hemi's. Mopars also trying to sell an Aluminum Hemi but it's a little pricey.

Terry