See if your friend will sell you the GT GFX. Your car would look 10429949 times better
As for the interior most of it should be pretty easy. Seats will be cake. Steering column is easy. Might wanna take the lock cylinders out of the doors on the donor car so you only need one key. Or take the one out of the old column. But I have no idea how hard that one is. Shifter shouldn't be too hard. I'm not sure of the cable runs through the firewall or under the car. If it runs under the car then that should be pretty easy as well
