Join Date: Sep 1999
Location: Vancouver, Washingon
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Re: 350 swap... exhaust manifold problem
The exhaust manifold you show is what I call the "Y" design. Starting in the early 80's are what I call the "TUBE" design. The "Tube" design will sit higher in the block. The only problem I see with the "TUBE" design is that the passenger side exhaust manifold will need a head that has the seven exhaust manifold bolt pattern. Here are my two choices for possible donor vehicles that will have the "Tube" design exhaust manifold. The 49 state federal emission package equipped 1982 GMC with a 305 4 barrel will have the "Tube" design without air tubes or an oxygen sensor. I know this for a fact, I own an 82 GMC that had the 305 like I described. The next choice would be a V8 Chevy car starting in 1980 or newer, which will have the "Tube" design with air tubes, and an oxygen sensor.