If the eng is stock, somewhere 'tween 8 & 12 should work with the HEI. If you have a hotter cam , you may go to 14 initial. Just listen for spark rattle, & keep advancing as long as it doesnt rattle. If you want to set it up, I would suggest a Crane adjustable advance/spring kit & follow the basic instructions. You should set up in the range of 10-12 initial, with a 32 degree total(all in around 3000), & cut the vac advance can to 10-12 degrees with the advance limiter......& i would run the vac advance to a full manifold nipple @ the carb. Your app may handle a little more or less timing, but you should be in the ballpark. Good luck,crazyL
