Is it worth it?

The Piston/rod assembly from Mopar is ~$78. Head gaskets and oil pan gaskets are re-usable I believe. Head bolts can be re-used once (per Stu @ intertia). I don't think springs are too bad- I'd upgrade to 6.1 springs (or better if throwing a cam in).

Have you pulled the head? A set of core heads go for ~$250 (sell) -450 (buy) for a set, and a bare block without damage probably $100-200. What all is damaged would determine what I'd do.