What color is the smoke? Blue? Oil is burning, maybe worn rings. Black? This would be an overly rich fuel/air mix. White? This would indicate a crack in the head gasket or the head or the block. Does the smoke only appear when cold starting, then it goes away after a while or is constant? Is there coolant/water in the oil?

So I had some time to play with the Willys this afternoon. I did have the idle adjusted a little high (900 rpm). I turned the idle screw in a little bit and adjusted the throttle screw as well. not it idles at a consistent 650 rpm.

Doing that helped, the smoke is almost gone at idle. When you snap the throttle I get black smoke. The idle screw is adjusted 1 3/4 turns out.

Now the latest development is at an idle while warm I now have a puff puff every once in a while. This is accompanied by a .5 psi drop in the vacuum gauge. Which by the way is reading 20 pounds now (after fiddling the dist a little more). Looks like I will be doing a valve adjustment on Sunday.

Question, can the metering rod setting cause a rich mixture? Where is one able to order the carter guage? I made my own from some instructions I found online, I'm not sure I fully trust my work though, lol.