HEI 1970's Ignition System Upgrade to Addco 8200 Kit. It is not cut & dry. Part 2 or 2

You need to make sure the weighs are free, the vacuum advance not only works (even if new) but slides free. Always check any new or reused spark plug gap. Use thermal paste for sure. A nice test drive. The old 305 is running so much better. A nice short test drive was so nice. Like and Subscribe - share too! Thank You Bobby