I have what I believe to be an exhaust leak under the hood and it did not look to be coming from the manifolds, but near the EGR valve.
Seafoam is great for finding the general area of exhaust leaks!
What comprises the EGR system in these 3100 sfi cars? The only experience I have is with early EFI Fords and their systems. valve>sensor>regulator and everything is internal to the manifolds/heads.
From where do our EGR valves tap the exhaust?
Where would you look first for leaks? Old gaskets?