Here is the story. I bought my 89 Formula 350 last July and it ran decent but with a rough idle and it wouldn't pass emmisions. It then progressed to a really bad idle and poor gas mileage. After that poor performance kicked in. And finally oily plugs and oil seeping out of the exhaust manifold gaskets. This brings me to yesterday. I read on a post where someone build an engine and it had oil on the plugs. He resolved his problem with a new intake manifold gasket so I did the same. Now the car runs great, smooth idle, good gas mileage, performs good, and no oil where it shouldn't be. Thanks to everyone who helped in my past posts.

 

Now its time to flush your coolant/oil systems