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Read your old posts, exhaust smell mentioned a lot ,even in traffic, smell after hot soak,fuel in oil. But runs good hot and Cold. Old float still in the carb. There were some old bulletins TSB that discuss things close to what you have there,pertain to holley 1945 carbs,high fuel level More testing needed before taking things apart.
Yes, that was my post. I appreciate you taking the time to help me troubleshoot. Replacing the spark plug wires and adjusting the choke solved those particular problems. I have rebuilt the carburetor, which was NOS 5 years ago and only has about 12k miles on it. I've adjusted the valves several times using the while-running method, and the last few times they were not far out of adjustment. I've adjusted the timing, checked vacuum advance, adjusted idle mixture, checked vacuum, etc. etc.As you might have seen in my old posts, I had reasonably good results when I did a compression test (multiple times over a period of months, decent results each time). However, I've had 2 shops do a leak-down test and both reported significant leakdown on various cylinders. I've been pretty mystified as to how the good compression test can be consistent with the bad leakdown test.
I appreciate the advice to check more accessible things before tearing the engine apart. But (1) I've done a lot of that already, and (2) I actually want to tear the engine apart. Some folks spend their time and money on golf or travel, I am using mine to learn about engines.
