Well I got the new bushings installed, the bolt for the one behind the rear wheel on both sides was about as thick as a pencil and broke instantly...that was a fun couple nights getting those out lol. Ended up having to cut open the trunk floor on the passenger side and remove the cage nut to make a new one, the remnants of the bolt did not want to detach themselves from the nut even after drilling it out. Changing the bushings did give me some more clearance, I did have to push the floor up just a little though...but I did get the drivers side header completely installed, had to dent it a little bit to clearance the lower control arm mount. Passengers side is almost there, have to do some more work on the control arm mount. I do have a little issue on the rear most passenger side body bushing, when removing the original one I noticed that the bushing was sitting cocked and not sitting flat on the frame. The replacement poly bushing is sitting the same way, it is tight but not sitting completely flat against the frame. My bumper cover has always had a slight bulge on the side of it next to the quarter panel, so I don't know if the car got bumped at some point before I owned it and slight knocked it out of alignment or what. All the other bushings are sitting perfect... I was thinking of just getting a fender washer and cutting it half to shim the side that isn't bearing on the frame. Anyways, thanks for all the help and suggestions, I appreciate it.