Jerry do you know what angle the exhaust manifold at the bottom is I have a new old exhaust for the truck so I assuming I need an angle piece to bring the exhaust back to vertical. I will stick with the 235 manifold. Do I need new rings or will the ones off the manifold work. I would think that motor should be better than the one I have as far as corrosion is concerned it has been sitting in my garage intact for the 20 some years.