Advice 401 Engine Rebuild Project

Doing up a 66 classic sedan in Melbourne Australia
body interior will be all origonal
287 engine lost in transit
I have put in a 290 changed bell housing rebuilt tourqe converter and it runs sweet
I also have picked up 401 heads great condition
As 360's are plentifull in oz I'm working on a 6 month project of building a Tuff motor
Need advice/options

Also looking for drivers/pasenger mirrors
Cheers Charles

hot cam, intake, headers, holley carb is the way i like to go, you can get performance heads if u can afford them, also u could bore and stroke the block for more cubes