I am planning on picking up a 5.9 myself to put on the stand, just a rering, bearing and hone job if all checks out ok. If the heads are not cracked I am using them as well. My post about spending $ on cracked heads, I meant valve job, new springs etc. Sometimes you can clearly see the crack between the seats and sometimes you cant, that's where you have them checked, its not that expensive. Here is a pic from this site. On the cam we need more info, like LSA, overlap etc.