Alfa 156 Rear seats in a 1/2 series

Picked up a nice interior at the wreckers out of a 156 to put the fronts in my 164. going to have fun fitting them up i know someone whose done it so its possible.

just wondering if anyone has gone about fitting up the rears to a 1/2 series. i know John Hughes has done it on a wagon however it has been mentioned it would be less work in a sedan. just wondering if anyones done it has recommendations about how to go about.

any help is always appreciated

cheers