318 Poly A engine in a 67 Cuda

Is your car running and driving right now? If not pop off the drivers heads and slap on a poly and see what your dealing with.
My car is a running car and I don't want to take it down just yet. When the guy is ready to put my frame connecters on and do the tunnel work for the A-500 trans crossmember I will fit a poly in. But that could be spring. Figured if I knew for sure from someone that's done it I could get started on the build. But that's a great idea.