Hello all, I have a 1969 Skylark, and I just replaced the engine with a 1970 SP code 350. As of this moment due to budget reasons, I am going to be bolting up the single exhaust again. I was just under the car, and I cannot get the damn y-pipe to line up correctly, and I am wondering if the manifolds are diff. It is not off by a tremendous amount, but just enough to be a B*tch. Are the manifolds the same between 1969 and 1970, or is the SP code motor diff. cause of factory dual exhaust??? Any help will be appreciated. thanks james