[mark houghton]

[QUOTE=hanson08;4942997]Most likely we will get to the end of the adjustment range available at the distributor before we reach the best advance for acceleration. I suspect about -15 is going to be a good place to be.
QUOTE]

True, in my case anyway. I was able to achieve no more than 8 degrees advance @ idle before running out of distributor adjustment room (fully rotated against the stops). That's 8 degrees with the vacuum retard hose connected. I know of at least one person that has run up to 14 degrees before detecting poor running. Each car, and each distributor curve, will differ - so what works for one may not work for another.
The car does not baulk and does get with the program better at the lower rpms. Would love to add a little more advance to find the limits, but it's not physically possible without removing the dizzy and re-indexing the drive shaft a tooth or so.