[Batman]

I think the 396 is is a 4.100 bore and 4.125 stroke (don't quote me on that). Doable with a stock block it will never be cheap. The rotating assembly alone if you get a good one will cost you close tp $2500. Plus about $1000 worth of block work, plus fasteners, good gaskets, Etc, Etc. Then you need to machine the heads or put on new one's $1500-$2500, plus the rockers $300+. I;d say that is a pretty good deal for a 396. Personally I would go for the 480HP 383. Keep the extra $1000 and use it for gas. You won't notice the difference on the street.