The early HEMIs are NOt a cheap engine to go through. PAW and Hot Heads are a couple of the better ones for parts/prices (compare between the 2 there is a difference between the two dealers.)

A good place to get an idea of fair market value is to check E Bay. Use 331 Hemi.... 354 Hemi.....392 Hemi.... and early Hemi as your search engine. Just putting in HEMI is information overload.

After you get it apart and check the cost of rebuilding it and the price used parts go for you might decide to E Bay it out