Here's a link to Mancini Racing engine "refresh" kits. The A & B kit are basic bearings, rings, and gaskets. The A kit has cast iron rings, the B kit has moly rings for about $5 more.
http://chucker54.stores.yahoo.net/enrebkit.html
Here's a link to a thread to help you dicipher the markings on the block:
http://www.forabodiesonly.com/mopar/showthread.php?t=285021