I just posted about it in my blog earlier, but... basically, Jane is blowing blue smoke out of the driver's side exhaust in a pretty large volume. Not mosquito fogger levels, but enough that I can see it in my rearview mirrors. Must have screwed something up on the engine rebuild. Anyways, so we all figured we'd pull the plugs, find the fouled plug (because one has to be covered in oil if oil is getting into the exhaust), do a compression test to hopefully figure out the source (head gasket or top end valves/intake), maybe even fix it.
This of course mostly just translated into Bill, John, Don, and Ed standing around Jane's engine bay watching me do all the hard work

I pulled all of the plugs on the driver's side and surprise, surprise, all of them are exactly perfect with no oil on them at all. Interesting. So we figured we'd just do a compression test on all four cylinders but then the kit that Don had brought over was metric so... we didn't. Then I put that side back together, pulled the plugs on the other side (they were also fine), put THAT side back together, fired her up, and then it smoked from BOTH sides of the exhaust for the rest of the day. Resumed only smoking on driver's side the next day.
We put in some oil thickener stuff (Baer's??) to at least keep it from burning so much, then called it whatever. The engine is apparently still smoking, though not as much at idle anymore LOL. Whole experience was pretty entertaining, really.