difference between 440 & 383

I have a 440 but it needs to be rebuilt! I can get a running 383 to put in it for the time for $200, what is different between the two. Is a 440 wider and are the exhaust ports at a different angle,(do the heads interchange)? Motor mounts different? willl my 4 speed bell housing bolt up to it? I am sure many of you know the answers to these questions! Any help is greatly appreciated! Jared
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