I did this on my 2wd 95 years ago. If I remember correctly I had to drill a hole in the bumper brackets to match the frame. DO NOT switch to the clear headlights, if you have the old style. I have had tons of problems with this little mod.
As far as the O2 sensor mine was in the Y pipe before the cat. When I swtched to true duals and headers I welded in a bung and ran the O2 sensor off of one bank.
Last edited by Monster4.0; November 30th, 2007 at 12:04 PM.