EA-ED bucket seats will bolt right in instead of the bench seat, but just make sure you buy the runners as well... EF-EL seats will go in, but require some modifications to the mounting points at the rear, closest to the transmission tunnel, as EF-EL has a raised part here and the EA-ED does not.
As for the centre console, an EA-ED will go straight in, but again the EF-EL will require modifications. Firstly, it doesn't meet up to the dash in the same way so unless you're gonna go for an EF-EL dash, then it's a bit of a pain. Also, the previously mentioned larger transmission tunnel means that new brackets will need to be constructed to hold the console. And lastly, as Chris Nee mentioned, there's the whole handbrake issue...
We put bucket seats and an EA fairmont console in my dad's old EA Gli about a year ago now... it was VERY worthwhile - as long as you can find something to do with the area where the t-bar belongs (we constructed a metal box to fit in, thus creating a nice little storage compartment)
Hope this helps,