Re: Timing Problem
max, do you have EFI in that car? If not, LEAVE THE DIAL BACK FEATURE OFF. Mark the dampener, and read actual degrees. I don't care whom says to use the dial back feature on an analog ignition system, it is not for anything but computer regulated ignition timing curves, NOT for points, non-feedback electronic, mechanical, vacuum advance ignition systems. Why? Well, ignition systems that are NOT computer timing controlled don't have "computer lag" when determining timing, mechanical advance is right now, not delayed to read inputs to compute tming. Dial back lights have a delay built into them to allow the timing computer to compute and make the spark.
NON-COMPUTERIZED IGNITION TIMING FUNCTIONS DO NOT HAVE A COMPUTER LAG, so, using a feature on a timing light that reads a computer lag, just is not accurate, period, plain and simple, and not one lag time timing light can read actual timing, UNLESS the dial back computer timing feature REMAINS TURNED OFF.
I have within the vacuum advance info package, pics of how to mark the dampener to read advance with the regular timing lights, or, dial back left off. This can be done with white chalk, then wiped off if so desired, or, permanently added, your choice. Package is free, no ads, no cost, all it costs is your time to ask for it, and read it. email address for package is above in my previous post.
As for the acceleration issues, please mark the dampener, and then, leave the dial back off, and plot the timing curve, make sure the mechanical advance is coming back down at idle. Sounds like either the mechanical advance is binding and staying advanced a bit when the engine idles down, and/or there is a serious vacuum leak/carb issue. Let us know what you come up with, please.
Lets make sure the timing is working correctly, then, we can attack the carb and see if it has issues.