You're right on the money as far as stock weights go. Plus, as I'm sure you're aware, there are a lot of differences in cylinder heads, too. The truck heads, for instance, like what I have on my 331, are much heavier than a lot of the other castings, because they have a lot more meat in them and lack the front cross over water passages. All that area is solid iron. I have the Chevy conversion on my engine and I promise you, it's heavier than a big block. I have two big blocks here. A 396 Chevy and a 400 Chrysler and this 331 eclipses them both. So, you were far from out of line. Please keep right on posting your opinion.