Will it Fit - 75 Z1 F

So while hunting wheels for my current build I came across a 75 Z1 900, I couldn't pass up such a great deal. My question is will a late 70s say 77-79 KZ1000 motor bolt right in as I have a spare, or should I just big block the 900 motor. 

Yes! All Z900/Z1000 ( 903CC -1015cc ) kickstart equipped motors share the same engine mounts and will bolt straight in.