1972 duster getting a 401 amc

I owned this car for over three years it's a /6 I recently rebuilt complete engine .60 pistons new everything but I met this guy who has a 401 amc small block with lots of competion Parts bored .30 over and lots of expensive Parts and the engine was never used he been having it for over two years now that I installed my slant I'm not happy with it even with all this work done to it still runs slow don't get me wrong it's nice reliable engine but have always dream of having a strong V8 WITH flow master sound just want to know if this Amc 401 engine share the same procedure as swapping an real mopar 360 for example .... this is the pic of the actual motor

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