My engine is pretty much done and if Im taking it out I would rather put something bigger in it. Right now I have a 400 that is cammed, edelbrock manifold and carb.(came with car, looking to get holley)

I am looking for a 455, but will take another 400 that has some mods to it. I dont care if the engine needs some work, would just rather put something more powerful in if Im taking mine out anyways