To desmog or not to desmog. I am revitalizing a '71 that I would guess had the smog pump belt removed very early in its life. I am desmogging it now. The plumbing of the smog system is is about 20% full of corroded material. On my '71 the emmision stuff was quite simple. A pump that injected fresh air into the ballance tube of the intake and into the exhaust manifold at each port. My system had a leak on the common rail for the exhaust injection which prompted me to go ahead with the desmog project. If there is now visible corrosion or leaks, you aren't forced to remove or repair. I would suggest that if you have the time, ambition and can fight the urge to keep your machine off the road, desmog it. It will tidy up that side of the engine nicely. It may take a little bit of grunt work as the nuts and hose clamps are *stubborn and a *little tough to get at. I also am using a reciprocating saw on the exhaust section to allow a box wrench or socket to loosen the nuts on the exhaust ports. Wall of text to you :classic: thor thor