Hi all, Doing the 307 to 350 swap and I have a question reguarding the o2 sensor. I have an 87 cutlass with the "y" 307 motor. So, I have all the nasty parts (SS manifolds, 7A heads, etc.). I scored a complete 350 for really cheap with the manifolds. What I was wondering is if I can drill and tap the passenger side exhaust manifold on the top of the horn for the o2 sensor? It appears as though there is a spot that was intended for this but not finished. I've seen the 80's manifold online with the bung, but older olds parts around here are getting scarce.
