Actually now you mention it there is black smoke residue on the Headers by ports 2 and 4 that was not there when the 318 was in. I'll have to investigate that tomorrow when I get the 340 running again.
If its the Head Gasket will the Oil Trick tell me this?
Not specifically that; it will just say that it is not likely rings. RRR's note is good if you have access to compressed air. If you are gonna do that, do it BEFORE you pull the heads.
The black residue could be an exhaust gasket leak too.
