Should I get a 360 motor/tranny

According to the parts manuals all /6 cars with air got larger diameter torsion bars...the same size bars as 318 cars. This was done to compensate for the extra weight of the compressor etc. My 73 /6 with factory a/c had 318 bars in it. Those came out and solo road racing bars went in...a little stiff with the /6 but now that a 360 is going in should handle great... So you need discs up front for sure(as rumblefish suggested), a larger rear; the 7.25 won't handle the pressure for long. If the trans is a 727 you will need a different drive shaft to match the rear you go with. I got a new rad..The /6 has both inlet and outlet on the passenger side so not sure if you could make the rad work with the v8...

So like above there's no replacement for displacement...lol And there is lots of performance parts for the 360 too.