Dennis,
In case you have not seen the mind-bogglingly-simple technique for tuning timing & carburetor with a vacuum gauge, here is an abbreviated run-down.
1. Disconnect the rubber line from the vacuum wiper motor to the port/fitting/tube on the intake manifold (at the intake manifold).
2. Connect a rubber line/tube from the vacuum gauge to the vacuum fitting on the intake manifold.
3. Start the engine and warm it up.
4. Set the idle RPM to around 450-500 RPM (or, by ear, if do not have a tachometer).
5. Adjust the timing by rotating the distributor slowly in both directions, to obtain maximum vacuum. At max vacuum, tighten the bolt on the distributor.
6. Re-adjust the idle speed, if necessary.
7. Adjust the mixture screw on the carburetor to obtain maximum vacuum.
8. If you want to continue, repeat steps 4-7.
9. Disconnect the vacuum gauge hose at the manifold and quickly reconnect the vacuum hose to the wiper motor.
10. Go for a test ride.
Good luck.
