I'm sure this has come up before somewhere, but has anybody have experiences with salvaging marinized engines for cars? Repower take-outs can be had pretty cheap sometimes and some feature better performance parts as standard compared to their automotive cousins. I salvaged a late 302 a number of years ago and it had the 'good' D0 351 heads on it with screw-in studs and guideplates from the factory, plus a few other interesting goodies like a three-bolt 50 oz damper. Unfortunately, the block was cracked.... My main concern would be rust if it had a 'open' cooling system and around here that likely means salt water cooled. Had bad does the rust have to get before it's beyond the point of saving? What's the best method of cleaning one out?