Does anyone know if the exhaust outlets on a 66 330ci Cutlass let out in the same general area as the big block manifolds? Is the manifold outlet the same size or smaller than a big block? These are the manifolds that have the crossover outlet on them but it is capped and has dual exhaust on it now.

The reason I ask is because I'm toying with the idea of getting big block down pipes to hook up to the rest of my exhaust.

Thanks,
George