66 Dart 360 Swap Questions

Hey all, I am currently in the process of ordering parts to build and swap a 1976 360/904 into my 1966 Dart 270 (formerly a slant/904 car). I have a couple of questions that to my understanding haven't been talked about clearly on the other threads: What radiator would fit in the car with the 360? What manifolds/headers (cheaper the better) would fit with the least amount of hassle? What other parts besides motor mounts would I need to make the swap successful? How difficult would it be to run dual exhaust? Any help would be greatly appreciated, and help move the project along tremendously!

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