G'day, I'm new round here but thought I could help.
To fit a 440 big block into an Australian car (which are the same as an American "A" body) you need a set of big block engine mounts - typically the vehicle the engine and motor is out of would be a good place to start. Once you've hoisted the box and motor in you could check gearbox crossmember alignment. The 727 is a large g/box and may need some tunnel work to fit. You will also need a shortened tailshaft as it is slightly longer than a 904 as well. Please note there are two types of 727 (those fitted to small blocks and big blocks differ slightly.) A local 360 would have a slightly different 727 to what is fitted to a big block.
Hope this helps...
PS. If you are seriously considering this engine/box combo, you should invest in chassis strenghtening. Sub-frame connectors (ie. connect the front and rear chassis together by welding rails from front of the car floor to the rear chassis. There is also wheelspin issues you will face. Have fun
