Seems like the issue is solved. You can't use an 6 spd tranny crossmember on an FXT, and you can't use an FXT tranny crossmember on an Impreza. It does very funky things to the angle of the driveline and causes lots of vibrations and nasty sounds. So we changed the STi 6 spd tranny crossmember out for my old FXT tranny crossmember, and it's all good
I actually came home yesterday to find a nice surprise!!! A certain someone gave my car a bath!! And I know this was no easy task! There were weeks of splattered bugs on the front end that did not want to come off, but it's all shiny now!!! Or was until this rain we had this afternoon.
Now with more Kartboy. I got a lightweight Kartboy crank pulley for CHEAP, brand new, so I just installed it. Nice to get rid of my rusty, crusty stock one.