To De-Smog or not to De-Smog...

2 Darts said
At the same time, I know what I did. To defeat EGR, I hogged out the hole under the carburetor in the intake and pounded an oil gallery plug into it. I then replaced the exhaust manifold with one that can not provide an exhaust gas source for EGR, nor for carb heat. I also made sure the vacuum source to the EGR valve I had disabled was plugged. Due to the removal of the exhaust manifold, I had to fabricate stand-offs in order to retain the factory throttle & kickdown linkage.
Click to expand...

What was your intention with the fabrication of the exhaust manifold? With the stubbed-in pipes, you've made the exhaust less free-flowing. With the elimination of the hot-spot under the carb, you've made your car more suited to the drag strip than the street. See Intake Manifold Heat for more information and check the references provided.