Timing help for '64 Dart, 225 CI

Your post says all checks without vacuum and doesn't say what rpm. A '64 distributor starts advancing at 560 rpm, with the check at 550. I'm guessing you have no tach or vacuum gauge.

Put away the timing light. Use your ear for rpm, connect the vacuum advance, turn the distributor to bring the rpm up, adjust the carb to bring the rpm down to where it doesn't jerk when you put it in gear or so low an rpm to stall when put in gear and lock it down. If it doesn't crank and start well and/or pings/rattles on hills, reduce initial a little until it works well all around. Back and forth distributor and idle speed adjustments.