SBE 318 basic rebuild +CAM , INTAKE, HEADS, expectations?

If you are gonna keep it as is, there are .028 compressed thickness head gaskets that will help.. not a ton but every bit..

BTW.. buy the trick flow billet timing chain.. it's $100 and quality... not a spot to go cheap.
+1 on that summit/trick flow chain, it's a real VFM piece