Don't want to step on anyone's toes here, but the 782 came with an aluminum block kohler.
Series 1, series 2, and replacement Mag 18's are all aluminum blocks.
They do have separate cast iron cylinders bolted to that aluminum block.
That said, I would pass on it for the price.
If you like a 782, get one with a series 2 or better yet, M-18 in it.
